Cook the spaetzle according to the instructions on the packet. Cut the onion into cubes and fry in the pan. Cut the meat into small pieces and fry them. Add the processed cheese, the tomato pieces and the chopped paprika, season to taste and mix well. Put the spaetzle in a buttered baking dish and sprinkle with nutmeg and some grated cheese. Then pour the sauce over it and sprinkle with grated cheese if you like. Bake the whole thing for about 15 minutes at 200 ° C, until the cheese has melted golden yellow.