Broccoli, Rice, Cheese, and Chicken Casserole

Name: Broccoli, Rice, Cheese, and Chicken Casserole
Prep time: 15 min
Cook time: 36 min
Total time: 51 min
Cuisine: American
Ingredients: 2 cups water; 2 cups uncooked instant rice; 2 (10.1 ounce) cans chunk chicken, drained; 1 (10.75 ounce) can condensed cream of mushroom soup; 1 (10.75 ounce) can condensed cream of chicken soup; ¼ cup butter; 1 cup milk; 1 (16 ounce) package frozen chopped broccoli; 1 small white onion, chopped; 1 pound processed cheese food