Pizza is a popular dish made with an oven-baked, flat, generally round bread that is covered with tomatoes or a tomato-based sauce and mozzarella cheese. Other toppings are added according to region, culture or personal preference. Originating as a part of Italian cuisine, the dish has become popular in many different parts of the world. A shop or restaurant where pizzas are made and sold is called a “pizzeria”. The phrase “pizza parlor” is also used in the United States.