Beef Stroganoff I - cooking recipe

Ingredients

1/4 cup butter
1 1/2 pounds sirloin tip, cut into thin slices
1 onion, chopped
1 (16 ounce) container sour cream

Preparation

Melt butter in a large skillet over medium heat. Add beef and the onions; cook until the meat is browned and the onion tender.
Stir in sour cream, and heat through. Do not boil.