Preheat oven to 450°F. Place pizza crust on large baking sheet.
Mix mozzarella and Parmesan cheeses in small bowl. Toss vegetables, 1/2 cup of the cheese mixture, oil, Italian seasoning and garlic powder in medium bowl. Spread mixture evenly over crust. Top with olives and remaining cheese mixture.
Bake 8 to 10 minutes or until cheese is melted. Cut into 2-inch pieces to serve.