1 med. onion
1 lb. ground beef
2 tbsp. flour
1 can diced mushrooms
1 can cream of chicken soup
1 (8 oz.) carton sour cream
Rice or noodles

Brown onion in butter. When soft, add ground beef; brown. Add salt and pepper to taste. Add flour and mushrooms; mix well, then add undiluted soup. Simmer 5 minutes and stir in sour cream. Serve over cooked rice or noodles.