Provel is a white processed cheese particularly popular in St. Louis cuisine, that is a combination of cheddar, Swiss, and provolone cheeses, it is the traditional topping for which distinct type of pizza popular in the Midwestern American city of St. Louis, Missouri and surrounding areas?
Provel cheese:  It is the traditional topping for St. Louis-style pizza. St. Louis-style pizza: St. Louis-style pizza is a distinct type of pizza popular in the Midwestern American city of St. Louis, Missouri and surrounding areas.
St. Louis-style pizza