Heat oven to 450° F. Spray 12-inch pizza pan with cooking spray. In 10-inch nonstick skillet, cook beef over medium-high heat 5 to 7 minutes, stirring occasionally, until thoroughly cooked. Drain; set beef aside. Add onions to skillet; cook 6 minutes, stirring occasionally, until tender and beginning to brown. Add garlic; cook 1 minute. Remove from heat. Stir in beef, rosemary and pepper. Sprinkle cornmeal on pizza pan. Unroll dough; place in pan. Starting at center, press out dough to edge of pan. Spread marinara sauce over dough to within 1/2 inch of edge. Sprinkle with 1/2 cup of the mozzarella cheese. Spread beef mixture evenly over cheese. Sprinkle with remaining 1/2 cup mozzarella and the Parmesan cheese. Sprinkle with bacon.