Steam the broccoli, covered, 4 minutes. Drain. Combine broccoli and next 7 ingredients (broccoli through garlic). Spoon into an 11 x 7-inch baking dish coated with cooking spray. Bake at 350° for 20 minutes or until bubbly.
Hot Asiago Cheese Sauce:
Lightly spoon flour into a dry measuring cup; level with a knife. Place flour in a medium, heavy saucepan; gradually add milk, stirring with a whisk until blended. Place over medium heat; cook until thick (about 8 minutes), stirring constantly. Remove from heat; add cheese, stirring until melted.