Fry leek, bacon and mushrooms. Add flaked smoked mackerel, enough creme fraiche to make it into a sauce and a few handfuls of baby spinach. Stir in cooked pasta, top with grated parmesan and breadcrumbs. Cook in oven for about 20 minutes.
Make a tomato sauce in an oven proof dish then cook the pasta in it directly - from dried - stir occasionally so that it doesn't stick. Then add torn up mozzarella, small carton of double cream, a handful of fresh torn up basil leaves and a couple of tablespoons of grated Parmesan. Bake at 200C for about 20 minutes then serve with salad and crusty bread.