1/2 c. chopped onion
1/4 c. butter
1 (16 oz.) pkg. frozen chopped broccoli, thawed
1 1/2 c. cooked rice
1 (10 3/4 oz.) can cream of chicken soup
1 (8 oz.) jar Cheez Whiz

Saute onion in butter until tender. Add remaining ingredients and mix well. Turn into glass baking dish and bake at 350 degrees for 1/2 hour.