Cook rice as directed on box.
Saute onions in margarine until done.
Cook broccoli as directed on package and drain.
Mix together broccoli, soup, rice, onion, butter or margarine, and cheese.Season with salt and pepper to taste.Place in a 9 by 13 inch oven proof dish.
Bake for 30 to 40 minutes at 350 degrees F (175 degrees C).
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