Cook the pasta according pack instructions. Squeeze out the meat of 3 sausages. Make little balls from the meat and brown them in a frying pan. Add 250g halved cherry tomatoes, 250g sliced chesnut mushrooms and some finely chopped rosemary. Cook this until the mushrooms are done. Add 100ml creme fraiche and 1/2 a tablespoon mustard. Stir well and let it simmer for about 5 minutes. At last scatter some finely chopped parsley over it. Enjoy!