Broccoli and Rice

1 onion, diced
1/2 stick butter
1 can cream of chicken soup
5 oz evaporated milk
10 oz cheez whiz
2 cups uncooked minute rice
32 oz frozen chopped broccoli

Saute onion in butter. Add cream of chicken soup, milk, cheez whiz and broccoli.  Cook for 10 minutes.  Cook minute rice as directed on package for 2 cups worth of uncooked rice.  Add cooked rice to cheese mixture.  Place in a greased 13x9 pan and bake at 325 for 30-45 minutes, or until bubbly along edges and golden on top.