Greek pizza refers to a style of pizza crust and its preparation, rather than its toppings. This style is baked in a pan, instead of directly on the bricks of the pizza oven (as is more traditional for Italian pizza). The pan used is a shallow pan, in contrast to the deep pans used in Chicago-style deep dish pizza. The pan is heavily oiled with olive oil. It has a crust that is usually chewy and puffy, almost like focaccia bread but not as thick. The crust is also rather oily, due to the heavily oiled pan used for the cooking process.