Preheat oven to 400°.
Heat oil in a nonstick skillet over medium-high heat. Add onion and next 5 ingredients (onion through garlic); sauté 7 minutes or until browned. Combine corn and milk in a saucepan over medium heat; cook 13 minutes.
Unroll dough (do not separate into strips). Roll dough into a 12 x 10-inch rectangle on a lightly floured surface. Place dough on a baking sheet coated with cooking spray and sprinkled with cornmeal. Crimp edges of dough with fingers to form a rim. Sprinkle mozzarella cheese over crust; top with corn mixture and vegetables. Sprinkle with Parmesan cheese. Bake at 400° for 15 minutes or until crust is golden. Let stand 10 minutes. Sprinkle with parsley.