Neapolitan sauce, also called Napoli sauce or Napoletana sauce is the collective name given (outside Italy) to various basic tomato-based sauces derived from Italian cuisine, often served over or alongside pasta.
In Naples, Neapolitan sauce is simply referred to as la salsa, which literally translates to the sauce. The basic sauce is vegetarian, although meat such as minced beef or sausage can be added. Italians refer to Neapolitan sauce only in association with other recipes, for instance, ‘spaghetti napolitana’.