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Pizza
Pizza is an oven-baked, flat, round-shaped bread covered with tomato sauce, cheese, olive oil and optionally other toppings. There are, broadly speaking, two types of pizza: the neapolitan one, which is relatively tick and ressembles a flat bread, and the roman one, which is much thinner and crustier. The neapolitan pizza is close to the type of pizza found in the US.
Italians also distinguish between red (with tomato sauce) and white pizza (also called foccacia, which has no tomato sauce, but can be topped with other ingredients).
In Italy (and the rest of Europe) the name Parmesan is a protected designation of origin for the hard, granular cheese from Parma. The generic name for this type of cheese from other parts of Italy is grana.