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    Home » Recipes » Seafood

    Salmon Casserole

    By Dannii · Published 1st December 2020 · Updated 2nd December 2020 · 23 Comments · This post may contain affiliate links and generates income via ads · This site uses cookies · Post contains 1873 words. · About 10 minutes to read this article.

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    * This is a sponsored post for Scottish Salmon Producers Organisation *
    Salmon casserole is total comfort food. Delicious flakes of baked Scottish Salmon mixed with spinach and onions in a creamy cheese sauce, all layered between slices of potato and baked to crispy perfection. If you are looking for a new way to enjoy salmon, then this is it.

    A baking tray containing a cheese topped bake with sprigs of dill.

    Some dishes are worth putting in a little more effort for, and this salmon casserole is definitely one of them. It is cheesy and comforting, but still packed with Omega-3s and iron. We say "casserole", but it is more of a salmon and potato bake. But it is a really saucy dish, so it has that casserole element to it.

    Jump to:
    • Why should you try it?
    • What you will need
    • Step by step
    • Health benefits of Scottish salmon
    • Why Scottish Salmon?
    • Health benefits of potatoes
    • What vegetables to add
    • Cheese sauce
    • What to serve this with
    • FAQs
    • Extra tips
    • More salmon recipes
    • Recipe
    • Feedback

    Why should you try it?

    • Cheesy and creamy comfort food
    • A delicious and easy way to cook with Scottish salmon
    • Easy to adapt with different vegetables
    • Freezes well

    What you will need

    • Salmon - We used wonderful Scottish Salmon. First it is baked and then mixed in to the cheese sauce. I know some people are scared of cooking fish because they think it will over cook and be dry, but this is a fool proof recipe and the salmon is perfectly cooked. The key is making sure it is cooked on a low heat.
    • Potatoes - these are key to the layering of this salmon casserole. We used russet potatoes, as we find they are best for roasting. But you could use any white potatoes, or even swap them for sweet potatoes.
    • Cheese sauce - this is where all the comfort of the dish comes from. You can use a store bought cheese sauce, but it is so easy to make your own. All you need is milk, butter, flour and cheddar (but you can use any cheese that melts well). You could add a little mustard to the cheese sauce for extra flavour.
    • Dill - we think that dill and salmon are the perfect flavour combination. You could swap it for fresh flat leaf parsley if you don't like dill.
    • Onions - the base of most dishes, this salmon casserole is no different. it adds lovely flavour and texture.
    • Spinach - we love any recipe we can give a green boost to and the spinach pairs well with the salmon and creamy sauce.
    All the ingredients needed for this recipe on a wooden surface, each with a text overlay.

    Step by step

    One: Preheat your oven to 220°C/425°F/Gas 7. Bake the salmon for 15-20 minutes, until cooked through. Once cooked, remove form the oven and flake. Reduce the oven heat to 190°C/375°F/Gas 5.

    Two photo collage of salmon on a baking tray, one whole salmon side, one flaked.

    Two: Put the potato slices in a pan of boiling water and then reduce to a simmer for 4-5 minutes.

    A silver saucepan containing sliced potatoes in water.

    Three: Heat the oil in a large pan and add the onion. Cook for 4-5 minutes. Add the spinach and cook until wilted (about 2 minutes). Add the salmon to the onion and spinach. Remove from the heat and set aside.

    Four picture collage of onions, spinach and flaked salmon in a frying pan.

    Four: Make the cheese sauce by adding the milk, butter and flour to a pan. Heat gently until the butter has melted, whisking constantly. Add 120g of the cheese and dill and continue whisking until the cheese has melted.

    Four shot collage of the process of making a cheese sauce.

    Five: Grease a large baking dish and put a layer of potatoes on the bottom. Add a layer of cheese sauce and then a layer of salmon mix.

    Three shot collage of a baking dish with potatoes, cheese sauce and salmon mix.

    Six: Repeat with another layer of each, finishing with a layer of potatoes and then cheese sauce. Cover with cheese and bake in the oven for 40 minutes.

    Two shot collage of salmon casserole in a baking dish, one showing cheese sauce covered potatoes, one with grated cheese on top.

    Health benefits of Scottish salmon

    • It is one of the best sources of long chain omega-3 fatty acids, which have been proven to reduce inflammation and lower blood pressure. Children who regularly consume foods rich in Omega-3 have been shown in studies to have increased concentration levels and improved learning abilities.
    • Salmon is an excellent source of high quality protein - a 100g (3.5oz) portion contains 25g of protein.
    • Contains high amounts of B vitamins. These are good for repairing DNA and reducing the causes that can lead to heart disease. B vitamins also help maintain optimal brain and nervous system functioning.
    • Scientists are investigating the role fish consumption may have in protecting people from some cancers, Alzheimer’s disease, depression, asthma, diabetes, macular degeneration, high blood pressure and multiple sclerosis.
    • Contains antioxidants.
    Four salmon fillets on a round plate.

    Why Scottish Salmon?

    Salmon is a hugely versatile fish and as discussed above, has many health benefits for all ages as part of their diet. The fantastic salmon we used in this recipe had been provided by the Scottish Salmon Producers Organisation and it was a wonderful piece of fish. There are many reason why to choose Scottish Salmon for your next salmon recipe:

    • Scotland’s salmon farmers are committed to leading the world in growing healthy, tasty, nutritious food in the most responsible and sustainable way.
    • Scottish salmon is the UK shoppers number one choice when buying seafood.
    • With a lower carbon footprint than beef, lamb, pork and chicken buying Scottish salmon is a healthy choice for you and the planet.
    • It tastes amazing!

    Health benefits of potatoes

    White potatoes always seem to get a bad reputation, but we think they are nutrient dense. They are low in fat, sodium and cholesterol, they have nearly half of your daily vitamin C and they are a great source of potassium - even more than a banana.

    They are full of fibre and magnesium, and they are filling too. On top of this, they are also suitable for almost any diet, from vegan to gluten free. I am not sure what more you could want?

    You could swap the white potatoes for sweet potatoes, which would add lots of colour to this dish, and give it a sweeter flavour.

    Twenty dirty potatoes on a wooden surface.

    What vegetables to add

    We have added loads of spinach to this to give it a really leafy green veggie boost, but there is opportunity to add other vegetables too. You could chop up a selection of mushrooms like shiitake, oyster and chestnut to give a variety of texture.

    You could also add diced bell pepper, grated courgette (zucchini) or carrots and aubergine (eggplant), or even add some frozen peas to the cheese sauce. This is a good opportunity to use up whatever you have in your fridge.

    Cheese sauce

    Whilst you could go the easy route and buy a packet/jar of cheese sauce (nobody is going to judge you), it really is so easy to make yourself. Just some milk, butter, flour and cheese and you have an incredibly silky cheese sauce that has so many uses. But, it's the base of the sauce in this dish, mixed with plenty of dill.

    What to serve this with

    This is a pretty hearty and heavy meal, so we find it pretty filling on it's own and not really any need for anything else. Some crusty bread rolls are perfect for mopping up all that delicious cheese sauce though.

    If you want something light and veggie packed on the side, then we have a few delicious side dishes for you to try:

    • Balsamic and Garlic Roasted Cauliflower
    • Roasted Lemon Asparagus
    • Broccoli Salad
    • Roasted Cherry Tomatoes
    • Baked Carrot Fries
    • Balsamic Roasted Brussel Sprouts
    • Garlic and Parsley Roasted Carrots
    Salmon casserole in a baking tray with a section spooned out revealing the filling.

    FAQs

    Is salmon casserole healthy?

    With all the health benefits of salmon that we have listed above, this is a nutrient dense curry. It's also a good opportunity to add lots of vegetables like leafy greens. You could also add some other vegetables to boost the nutrients, or serve it with some veggie heavy sides.

    How do you know the salmon is cooked?

    If the salmon is beginning to flake, but still has a little translucency in the middle, it is cooked. It shouldn't look raw. You could use a meat thermometer and check it has got to a temperature of 62°C/145°F.

    How to store a salmon casserole.

    You can store this salmon casserole in an air tight container in the fridge for up to 2 days. It can also be put in a freezable container and kept in the freezer for up to 2 months.

    How to reheat salmon casserole.

    When reheating this dish, it is best done in the oven at a low heat. We reheated at at gas mark 5 for around 20 minutes, but check that it is heated all the way through first.

    Extra tips

    • If you don't like dill, then you can swap it for fresh flat leaf parsley instead.
    • Save yourself time and use a really good quality store bought cheese sauce.
    • If you cheese sauce is a little too thick, then just add a splash of milk until it is the desired consistency.
    • To ensure that all the potatoes are cut to the same thickness, and therefore cooked the same, use a mandoline. 
    • Use a meat thermometer to make sure the salmon is cooked all the way through.
    • For an extra boost of flavour, add a tiny sprinkle of paprika over the top before baking.

    More salmon recipes

    • Easy Salmon Curry
    • Salmon Tacos with Avocado Cream
    • Honey Mustard Salmon with Ayrshire Potatoes
    • Creamy Dill Salmon
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    If you’ve tried this or any other recipe on the blog then let us know how you got on in the comments below, we love hearing from you!
    Tag us in your creations on Instagram @hungryhealthyhappy - we love sharing photos when people make our recipes. You can use the hashtag #hungryhealthyhappy too.

    DON’T FORGET TO RATE THE RECIPE ↓

    Recipe

    Salmon Casserole in a baking tin with a spoon removing a portion.

    Salmon Casserole

    Delicious flakes of salmon mixed with spinach and onions in a creamy cheese sauce, all layered between slices of potato and baked to crispy perfection.
    4.86 from 28 votes
    Pin Print
    Course: Dinner, Lunch, Main Course
    Cuisine: British
    Prep Time: 15 minutes
    Cook Time: 1 hour
    Total Time: 1 hour 15 minutes
    Allergen:
    An illustration of a carton of milk.
    Dairy
    An illustration of a fish.
    Fish
    An illustration of two ears of wheat.
    Gluten
    Servings: 6 servings
    Calories: 465kcal
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    Ingredients

    UK Metric Measures - US Customary Measures
    • 500 g salmon
    • 800 g potatoes thinly sliced
    • 1 tablespoon olive oil
    • 1 large onion thinly sliced
    • 120 g spinach
    • 10 g dill finely chopped
    • 600 ml milk
    • 5 tablespoon plain flour
    • 60 g butter
    • 200 g cheddar cheese grated

    Instructions

    • Preheat your oven to 220°C/425°F/Gas 7. Bake the salmon for 15-20 minutes, until cooked through. Once cooked, remove form the oven and flake. Reduce the oven heat to 190°C/375°F/Gas 5.
    • Put the potato slices in a pan of boiling water and then reduce to a simmer for 4-5 minutes.
    • Heat the oil in a large pan and add the onion. Cook for 4-5 minutes. Add the spinach and cook until wilted (about 2 minutes).
    • Add the salmon to the onion and spinach. Remove from the heat and set aside.
    • Make the cheese sauce by adding the milk, butter and flour to a pan. Heat gently until the butter has melted, whisking constantly.
    • Add 120g of the cheese and dill and continue whisking until the cheese has melted.
    • Grease a large baking dish and put a layer of potatoes on the bottom. Add a layer of cheese sauce and then a layer of salmon mix.
    • Repeat with another layer of each, finishing with a layer of potatoes and then cheese sauce. Cover with cheese and bake in the oven for 40 minutes.

    Notes

    • If you don't like dill, then you can swap it for fresh flat leaf parsley instead.
    • Save yourself time and use a really good quality store bought cheese sauce.
    • If you cheese sauce is a little too thick, then just add a splash of milk until it is the desired consistency.
    • To ensure that all the potatoes are cut to the same thickness, and therefore cooked the same, use a mandoline. 
    • Use a meat thermometer to make sure the salmon is cooked all the way through.

    Nutritional Information

    Serving: 1portion | Calories: 465kcal | Carbohydrates: 33g | Protein: 32g | Fat: 24g | Saturated Fat: 13g | Cholesterol: 104mg | Sodium: 383mg | Potassium: 1316mg | Fiber: 4g | Sugar: 7g | Vitamin A: 2825IU | Vitamin C: 35mg | Calcium: 418mg | Iron: 3mg
    Have you tried this recipe?Mention @hungryhealthyhappy on Instagram and tag #hungryhealthyhappy!
    DisclaimerThe nutritional information provided is approximate and is calculated using online tools. Information can vary depending on various factors, but we have endeavoured to be as accurate as possible.
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    Reader Interactions

    Comments

    1. Marian

      March 09, 2021 at 7:31 am

      Is this salmon casserole freezable

      Reply
      • Dannii

        March 09, 2021 at 10:15 am

        Yes, it is. We have a little FAQ section towards to bottom of the post that answers all questions like that.

        Reply
    2. Colleen

      February 06, 2021 at 6:55 pm

      5 stars
      I'm always looking for new ways to cook salmon, so I was excited to find this recipe. I can't wait to make it this week!

      Reply
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    Welcome! My name is Dannii. Here you will find easy family recipes with a healthy twist, along with travel, home and family life and general happiness.
    Established in 2011, Hungry Healthy Happy has become one of the UK's most popular food and lifestyle blogs, with two successful recipe books published.

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