1. Thaw pastry sheet at room temperature 30 minutes. Preheat oven to 400°F.

2. Unfold pastry on lightly floured surface. Roll into 15- by 10-inch rectangle and place on baking sheet. Prick with fork. Bake 10 minutes

3. In medium skillet over medium heat, heat oil. Add broccoli, mushrooms, pepper and onion and cook until tender.

4. Spread Prego sauce over crust to within 1/2 inch of edges. Top with vegetable mixture. Sprinkle with cheese. Bake 5 minutes more or until cheese is melted. Cut into 8 pieces.