Put the mince, Parmigiano Reggiano, breadcrumbs, egg, nutmeg, 1 tbsp of chopped parsley, 1 tsp of salt and 1 pinch of pepper in a bowl. Mix all the ingredients very well using your hands.
Make meatballs of the size of a ping pong balls. Roll them in flour and keep them aside.
Pour the Marsala wine into the pan and let the alcohol evaporate.