Tender, juicy slow cooker lamb shoulder with garlic and rosemary, served with a delicious homemade mint gravy. An easy alternative to a traditional Sunday roast or Christmas dinner.
Heat the oil: Heat 1 tablespoon of Olive oil in a large frying pan over a medium-high heat.Season 1.3 kg of Lamb shoulder on all sides with ½ teaspoon of Fine sea salt and 1 teaspoon of Ground black pepper and add to the hot pan.
Brown the lamb: Brown on all sides.
See below for why we recommend this step.
Add the vegetables to the slow cooker: Add 1 Onion (sliced) and 1 Carrot (sliced) to the bottom of the slow cooker.
Add the lamb: Place the browned lamb shoulder on top of the vegetables.
Flavour the lamb: Using a sharp knife, make small cuts all over the lamb. Push slices of 3 Garlic clove and leaves of 2 g of Fresh rosemary into the cuts.
Add the stock: Carefully pour 350 ml of Vegetable stock (low salt) around the sides of the lamb rather than directly over it, so you don't wash off the garlic and rosemary.
Cook: Put the lid on and cook on HIGH for approximately 5 hours or LOW for approximately 8 hours, until the lamb is tender and pulls apart easily with a fork.
These timings are based on our 1.3kg boneless joint cooked in a 6.5L slow cooker
Let the lamb rest: Carefully lift the lamb out of the slow cooker and transfer it to a serving board. Cover loosely with foil and rest for around 30 minutes while you make the gravy.
The lamb should be soft enough to pull apart with two forks, although you can also cut it into thick slices if it holds together.For a more traditional roast appearance, you can finish the cooked lamb in a hot oven to brown the outside. See the extra tips below.
To make the gravy:
Remove the fat: Skim off as much fat as possible from the surface of the cooking liquid.
Transfer 250 ml of Lamb cooking liquid and vegetables to a saucepan. You should have around 250-300ml (1-1¼ cups).If you want a smooth gravy, you can strain out the vegetables, or blend some of them into the gravy for extra thickness and flavour.
Make the slurry: Put 3 tablespoons of Cornflour into a small bowl and mix with up to 75 ml of Cold water to make a smooth slurry.
Whisk in the slurry: Bring the cooking liquid to a gentle simmer. Gradually whisk in the cornflour mixture, adding only as much as you need to thicken the gravy.
Add the mint sauce: Add 1 teaspoon of Mint sauce, stir well and taste. Add more mint sauce if you want a stronger mint flavour.
Simmer the gravy: Simmer until the gravy reaches your preferred consistency, then season if needed and pour into a gravy jug.
Notes
Brown the lamb first - Although it's not essential, browning the lamb adds a lovely depth of flavour. It only takes a few extra minutes, and I think it's worth it.
Don't waste the pan juices - After browning, add a splash of stock or red wine to the pan and scrape up the browned bits with a wooden spoon. Pour everything into the slow cooker for extra flavour.
Don't add too much liquid - The lamb releases its own juices as it cooks. You want enough stock to keep everything moist and make gravy, but the joint doesn't need to be completely submerged.
For a browned exterior - Once the lamb is tender, carefully transfer it to a roasting tin. For an optional quicker finish, try a hot oven at 220°C/200°C fan/425°F/Gas 7 for around 20-30 minutes, checking regularly until the outside has browned.
Avoid repeatedly lifting the lid - Every time you open the slow cooker, heat escapes and the cooking time can increase.
Check the tenderness, not just the clock - Slow cookers vary, so use the cooking time as a guide. The lamb should pull apart easily when it's ready.
Skim the fat from the gravy - Lamb shoulder contains a good amount of fat, and some of this will collect on top of the cooking liquid. Removing it gives you a richer-tasting gravy without it feeling greasy.
Don't throw away leftover gravy - Allow it to cool safely, then freeze in small containers or freezer bags. If using freezer bags, lay them flat to save space.
Save some cooking juices for leftovers - Adding a little of the gravy or cooking liquid to shredded lamb helps keep it moist when reheating.
Check that the joint fits - Make sure you can close the slow cooker lid properly, particularly if using a larger bone-in shoulder.
Rest before serving - Giving the lamb time to rest makes it easier to handle and gives you time to finish the gravy and side dishes.