Preheat oven to 350 degrees F. Combine Seasoning Blend from 1 package Bag 'N Season for Pot Roast with 2 tablespoons flour. Gradually add 1/2 cup dry red wine, 1/4 cup water and 1 teaspoon Worcestershire sauce. Arrange Cooking Bag in 9x13x2 inch baking pan. Place 2 pounds sirloin steak, thinly sliced, in Bag with 1/2 pound fresh mushrooms, quartered, and 1 medium onion, cut in wedges. Pour seasoning mixture over meat and vegetables. Close Bag loosely with black nylon tie. Bake in lower half of oven 50 minutes. Let stand 5 minutes. Serve over noodles. Makes 6-8 servings.