Preheat the oven to 400 degrees F.
Place the pizza crust(s) on a pizza pan or a large baking sheet. Spread the crust(s) with pesto sauce. Top with the peppers, tomatoes, olives, and pine nuts. Sprinkle with the shredded mozzarella, and place the mozzarella slices on top. Bake 12 to 15 minutes or until the pizza has reached the desired doneness.