1 (1 1/2 to 2 lb.) flank steak
1 env. onion soup mix
1 (10 3/4 oz.) can cream of mushroom soup
1 1/2 c. sour cream
Freshly cooked noodles or rice

Preheat oven to 325 degrees, cut steak lengthwise into thirds and then crosswise into 1/4 inch slices. Combine meat, onion soup mix and mushroom soup in 2 quart baking dish. Cover and bake 1 hour. Stir sour cream into meat mixture. Spoon over noodles or rice.