Combine wine, oil, thyme, onion and garlic. Marinate steaks 30 minutes in baking dish. May refrigerate up to 1 day, bring to room temperature a 1/2 hour before cooking. Place steak in roasting pan, add onions and season to taste. Roast in a preheated 425 degree oven for 20 minutes. Reduce somewhat for an additional 10 to 15 minutes. Remove steaks and onions from pan and tent with foil. Save pan and meat juices.
For the Sauce Forestiere: In small skillet, cook bacon lardons on high until crisp and brown. Remove from pan. Drain all but 2 tablespoons fat. Use fat to cook mushrooms 3 to 5 minutes, stirring gently. Add to bacon. Meanwhile, bring wine, thyme and bay to boil and reduce to about 2 tablespoons.
Set roasting pan over medium-high burner. Pour in beef stock; mix with cooking scraps. Bring to boil and simmer 3 minutes to begin to thicken. Stir in wine glaze, butter, bacon, mushrooms, salt and pepper. Heat and remove bay leaf and thyme sprigs. Slice filets on the bias, sauce and garnish with onions. Serve with Chateau Potatoes, Creamed Carrots and Minted Green Pea Timbales (separate recipes).
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.