CUT steak into serving size pieces; SPRINKLE with salt and pepper to taste.
In Dutch oven (*see note 2), HEAT half of oil over medium heat; ADD onions rings and sliced mushrooms; COOK, STIRRING, until tender, about five minutes; REMOVE vegetables, SET aside.
ADD remaining oil to Dutch oven; BROWN steak pieces on both sides.
Thoroughly MIX wine and soup; POUR mixture over steak; TOP with reserved onion rings and mushroom slices.
COVER tightly; BAKE at 325° until tender, about two hours.
DRAIN off liquid; RESERVE for gravy.
Serve steak pieces with pan drippings/gravy on the side.
1. Recipe works well with any type of steak that needs tenderizing during cooking, such as cubed steak. 2. Instead of a Dutch oven, may use a large iron skillet with lid.
Per Serving (excluding unknown items): 762 Calories; 48g Fat (61.0% calories from fat); 40g Protein; 29g Carbohydrate; 2g Dietary Fiber; 107mg Cholesterol; 2864mg Sodium. Exchanges: 1 1/2 Grain(Starch); 4 1/2 Lean Meat; 1 Vegetable; 6 1/2 Fat.