1. Unroll pizza dough; place on two greased 12-inch pizza pans. 2. Bake at 425° for 6-7 minutes or until golden brown. 3. In a large skillet, cook beef and onion over medium heat until beef is no longer pink; drain. 4. Add in sloppy joe sauce; taste and adjust seasoning with salt and pepper. 5. Spread meat mixture over crusts. 6. Sprinkle with cheeses. 7. Bake for 6-8 minutes or until cheese is melted.