A traditional cheese-based sauce that is most often used as pasta sauce. The classic Formaggi sauce may be referred to as a "Quattro Formaggi" sauce, referring to the four varieties of cheese mixed in with the other ingredients in the sauce. Some of the common cheeses that are combined together and blended into the sauce include: Cheddar, Fontina, Gorgonzola, Gouda, Grana, Gruyère, Mozzarella, Parmigiano, Provolone, Ricotta, and Romano. The type of pasta and the selection of other ingredients with the pasta dish generally determine the types of cheeses that will be included in the Formaggi sauce. A few of the additional ingredients that will added to the cheeses may include: cream, tomato sauce, a type of meat such as ham or bacon, herbs such as rosemary, sage, oregano, and several other mild seasonings.