Arrange first 4 ingredients on a baking sheet coated with cooking spray; coat vegetables with cooking spray. Broil 5 1/2 inches from heat (with electric oven door partially opened) 3 minutes. Turn vegetables; coat with cooking spray. Broil 3 additional minutes or until vegetables are tender. Set aside.
Pat dough into a 12-inch pizza pan coated with cooking spray. Bake at 425° on bottom rack of oven for 5 minutes.
Combine milk and cornstarch in a small saucepan, stirring until smooth. Bring to a boil over medium heat, stirring constantly, and boil 1 minute. Remove from heat; stir in Asiago cheese and next 4 ingredients. Spread cheese mixture over crust, leaving a 1/2-inch border; arrange roasted vegetables and tomato over cheese mixture. Sprinkle with Parmesan cheese and basil. Bake at 425° on bottom rack of oven for 15 to 18 minutes or until crust is lightly browned. Let stand 10 minutes before serving.