Heat oven to 425 degrees F. Place pita rounds on an ungreased cookie sheet. Bake for 3 minutes.
Spread each pita with hummus; top with red peppers, feta, and mozzaella. Bake for 6 minutes more or until cheese has melted and edges are lightly browned. Top with olives and oregano. To serve, cut pizzettas in half. Makes 16 servings.