1 1/2 lb. thinly sliced bite-size pieces round steak
2 tbsp. butter
1 (3 oz.) can sliced mushrooms
1 sm. onion, diced
Salt & pepper to taste
1 can cream of mushroom soup
1 (8 oz.) container sour cream

Saute mushrooms and onions in butter in a large skillet until tender. Add beef and brown on both sides. Reduce heat to simmer and add soup. Season to taste. Cover and cook 1 1/2 hours until tender. Remove from heat, add sour cream, blend well. Serve over noodles or rice. Serves 4.