Heat oven to 375º F. Prepare pasta according to package directions.
Meanwhile, in medium saucepan combine cheese, milk and garlic powder; cook and stir over medium heat until cheese is melted and sauce is smooth.
Stir in cooked pasta, broccoli, chicken, salt and pepper. Spoon into buttered 3-quart casserole.
Cover and bake 35 minutes or until hot and bubbly.
0 servings