PREHEAT oven to 400ºF. Combine pepperoni, peppers, onions, tomatoes and dressing in 13x9-inch baking dish sprayed with cooking spray. Sprinkle with cheese.

CUT pizza dough into 2-inch chunks with sharp knife or kitchen shears. Place evenly over cheese.

BAKE 30 min.; cool 10 min. Invert onto platter; carefully remove dish.