A pizza bagel is a bagel with pizza toppings. The simple tomato sauce and cheese pizza bagel is the most common, though a layer of cream cheese sometimes is used as a base under the tomato sauce and cheese. Toppings are as varied as those for pizza.A bagel is cut in two. Preferably, the bagel should then be toasted lightly to control absorption of the tomato sauce. Each side is then covered with tomato sauce, cheese, and other toppings.