In recent years a trend towards "gourmet pizza" has emerged in various places, notably in Europe, Oceania and Asia. These pizzas consist of the same basic design, but include an exceptionally diverse choice of ingredients, such as eggplant, lamb, couscous, chicken, fish and shell-fish, meats done in ethnic styles such as Morroccan lamb and non-traditional spices such as curry and Thai sweet chili. A "white pizza" uses no tomato sauce, often substituting [pesto sauce]?.
The pizza originated in Naples, but it became a popular meal item in America in the early 20th century. Since then it has spread throughout the world. Several major corporations are chiefly engaged in the commercial production of pizza, notably [Pizza Hut]? (owned by Pepsi-Cola) and [Dominos Pizza]?.
Pizza may be baked with thin bread bottom (Italian style) or with thicker bread (pan pizza).