Beef Stroganoff (Becky Essig)

1 lb. round steak, cut in thin strips
½ c. sliced onion
2 t. margarine
1 can (10½ oz.) golden mushroom soup
½ c. sour cream
1/3 c. water & 1 t. Worcestershire sauce

Cook all afternoon in crock pot. Serve over buttered noodles.