1. Place an oven rack in the lowest setting. Preheat the oven to 450°F. Line a cookie sheet with foil.
2. Place 1 pizza crust on the prepared sheet. Spread half of the sauce on top, leaving a ½-inch rim. Sprinkle with half of the cheese, then arrange half of the meatballs slices and peppers on top.
3. Bake on the lowest rack until the crust is browned and the cheese is melted, about 13 minutes. Repeat with the remaining ingredients. Cut into slices and serve hot.