Clean the mushrooms, wash them if necessary and cut them smaller. Peel and chop the onion. Dice salami. Fry everything in hot butter while turning. Season well with salt, pepper and nutmeg.
Dust with flour. Add 300 ml water and cream. Bring to the boil and simmer for about 5 minutes. Stir in parsley.
Mix the mushroom sauce and gnocchi and place in an ovenproof dish. Sprinkle with cheese and gratinate under the preheated oven grill for 5-10 minutes.