Microwave Beef Stroganoff

1 lb Boneless beef sirloin steak

1/2 c Chopped onion

1 cn (10 3/4 oz) Campbell's

Condensed Cream of Mushroom Soup 1/2 c Sour cream

1/2 ts Paprika

Hot cooked noodles Freeze steak 1 hour to make slicing easier.Cut steak into very thin slices across the grain.In a 2 qt. microwave-safe casserole, combine beef and onion.Cover with lid;microwave on high 5 minutes or until beef is no longer pink,stirring once during cooking. In small bowl,stir soup until smooth;stir in sour cream and paprika.Add to beef,stirring to coat.Cover,microwave @ 50 percent power 3 minutes or until heated through.Serve over noodles.Makes about 3 1/2 cups or 4 servings.