Preheat oven to 425°.
Steam broccoli, covered, 5 minutes or until tender; drain. Heat oil in a small nonstick skillet over medium-high heat. Add onion and garlic; sauté 3 minutes or until golden.
Roll pizza dough out; cut into 4 rectangles. Roll each rectangle to 1/8-inch thickness. Place 1/3 cup broccoli in center of each rectangle; top evenly with cheeses. Sprinkle with onion mixture. Spoon 2 tablespoons pasta sauce over onion mixture. Sprinkle evenly with pepper. Moisten edges of rectangles with water; bring opposite corners to center, pressing to seal.
Bake at 425° for 14 minutes or until golden. Serve with remaining sauce.