Ground Beef Stroganoff

1 pound ground beef
1/2 cup (1 small) chopped onion
1/2 cup drained mushrooms (stems & pieces)
1 1/4 cups (10 1/2 ounce can) condensed cream of mushroom or celery soup
1/4 cup water or beef broth
1/2 cup sour cream

In fry pan, brown ground beef and onion; drain well.  Stir in mushroom soup and water.  Cover and simmer for 15-20 minues.  Stir in sour cream and heat through but do not boil.  Serve over rice, noodles or chow mein noodles.

Can bake at 350 degrees for 20 minutes until heated through.