Heat oven to 425°F. Spray 15x10-inch cookie sheet with cooking spray. Unroll dough on cookie sheet; starting at center, press out dough to edge of pan. Brush crust with remaining 3 tablespoons reserved barbecue sauce. Sprinkle with 1/4 cup of the cheese; top with chicken, bell pepper, onion, bacon and remaining 1 3/4 cups cheese.