Preheat your oven to 200°C/180°C(fan)/400°F/Gas 6.
Cook 280 g Pasta shapes according to the packet instructions.
Heat 1 tablespoon Butter in a pan and add 2 Portobello mushrooms and 1 Leek. Cook over a low heat for 6-8 minutes, until softened.
Add 60 g Spinach and continue to cook until wilted, about 2 minutes.
Add 240 g Cooked turkey, 75 g Cheddar cheese, 50 g Parmesan, 200 ml Creme fraiche1 pinch Sea salt, 1 pinch Ground black pepper and 1 teaspoon Dijon mustard.
Mix well and continue cooking until the cheese has melted, about 2 minutes.
Drain the pasta, reserving some of the water.
Add the drained pasta and paste water to the pan. Mix well to coat the pasta in the sauce.
Transfer it all to a baking dish.
Cover with 75 g Cheddar cheese and bake for 20 minutes.
Notes
You can make a vegetarian version of this by using leftovers of your favourite meat free roast.
For some added freshness, add some slices of cherry tomatoes on top when adding the cheese.
If you want to make this leftover turkey pasta bake really crispy, then you can put it under the grill/broiler for a couple of minutes before serving. You could also mix some breadcrumbs in with the cheese for extra crispiness.
Reserve a little pasta water to add to the sauce to make it really silky and smooth.
For some added spice, you can add some red chilli flakes.