1. Heat oven to 450°F. Heat oil in 12-inch nonstick skillet over high heat. Cook mushrooms, onion and garlic in oil about 5 minutes, stirring frequently, until onion is crisp-tender. Stir in parsley.
2. Spoon mushroom mixture over pizza crust. Sprinkle with cheese.
3. Bake 8 to 10 minutes or until cheese is melted.