3 lb. | beef round steak, 1/2 inch thick |
1/2 c. | flour |
2 tsp. | salt |
1/8 tsp. | pepper |
1/2 tsp. | dry mustard |
2 | med. onions, thinly sliced and separated into rings |
2 (4 oz. each) cans | sliced mushrooms, drained or 1/2 lb. mushrooms, sliced |
1 (10 1/2 oz.) can | condensed beef broth |
1/4 c. | dry white wine (optional) |
1 1/2 c. | sour cream |
1/4 c. | flour |