It is also prepared as a type of pizza pie. The Chicago Pizza Pie Factory was a chain of pizza restaurants. Customers begin by choosing which of the ingredients they'd like on their pizza pie. Correa's, ObedBufet (Ginza Project), Kitchennete, Krispy Kreme, Menza, Zotman Pizza Pie and others. Clam pie can be prepared as a pizza pie using clams as a topping.