Hamburger Stroganoff

1 lb extra lean hamburger

1 med onion

1/4 cup butter

1/2 tsp salt

1/4 tsp pepper

2 Tbsp flour

1 can mushroom pieces

1 can cream of mushroom soup

1 cup sour cream

Noodles

Brown hamburger and onion in butter until light brown. Add flour, salt and pepper, and mushrooms. Stir in soup. Heat to boiling, stirring constantly 5 minutes. Reduce hear, simmer 10 minutes uncovered. Stir in sour cream. Heat through. Serve over noodles.

Freezes well.