Boil the macaroni in lightly salted water, but only firm to the bite.
Meanwhile, the sauce can be prepared. Melt the butter in a saucepan, then add the flour and sauté for 1 minute, stirring constantly. Stir in the mustard and spices, then the cream and milk. It is best to use cold cream and milk to avoid lumps. As soon as the sauce is about to boil, reduce the temperature and add about 2/3 of the cheddar and the processed cheese. Now cut the ham into small pieces and stir in the chili peppers.
Mix the drained macaroni with the cheese sauce and place in a suitable, greased baking dish. Sprinkle the rest of the cheese on the pasta.
Bake in the oven at 180 ° C (200 ° C top / bottom heat) for 15 minutes. For a nice crust, I turn on the grill halfway through the process.