Pizza (pronounced /ˈpiːtsə/ (listen) or /ˈpiːdzə/; Italian: [ˈpit.tsa]) is a world-popular dish of Italian origin, made with an oven-baked, flat, generally round bread that is often covered with tomatoes or a tomato-based sauce and mozzarella cheese. Other toppings are added according to region, culture, or personal preference. Originating in a part of Italian cuisine, the dish has become popular in many different parts of the world. A shop or restaurant that primarily makes and sells pizzas is called a "pizzeria". The phrases "pizza parlor", "pizza place" and "pizza shop" are used in the United States. The term pizza pie is dialectal, and pie is used for simplicity in some contexts, such as among pizzeria staff.