Hamburger Stroganoff

1 lb. ground beef

1 medium onion, chopped

1/4 c. butter

2 Tbs. flour

1 tsp. salt

1 tsp. garlic salt

1/4 tsp. pepper

2 cans cream of mushroom soup

1/2 c, sour cream

2 c. hot cooked noodles

Cook ground beef and onion in butter until onion is tender.  Stir in dry ingredients and mushrooms.  Cook 5 minutes, stirring constantly.  Remove from heat, stir in soup.  Simmer uncovered 10 minutes.  Stir in sour cream, heat through.  Serve over noodles.