Hamburger Stoganoff

1 lb. ground beef
1/2 c. onion
1/4 c. butter ( I usually don't add this)
2 T. flour
1 tsp. salt
4 oz canned mushrooms
1 can cream of chicken soup
1 c. sour cream
1/8 tsp. garlic powder
1/4 tsp. pepper

Brown meat and onion. Drain. Stir in flour, butter, salt, garlic, pepper and mushrooms. Cook 5 min. stirring constantly. Stir in soup. Heat to boiling. Reduce heat and simmer uncovered 10 min. Stir in sour cream. Heat through. Serve over rice or noodles.