Chicken, Broccoli and Rice Casserole

1 box chicken-flavored Rice-a-Roni (cooked according to pkg)
1 16-oz package frozen broccoli (partially cooked)
2 cups cooked chicken
1 cup shredded Cheddar cheese
1 can cream soup (mushroom, chicken or celery)
1 cup milk
2 Tbsp margarine
1 small can French-fried onions

Layer rice, broccoli, chicken and cheese in 2 quart casserole dish. Combine soup, milk and margarine in small saucepan. Heat on low heat until butter is melted. Pour mixture over casserole ingredients. Bake at 350 for 45 minutes. Top with onion rings. Bake for an additional 5 minutes.

Note: You can prepare the casserole ingredients the night before, adding the soup mixture just before baking.