Beautiful Red Wine Mushroom Sauce For Steak Design. Heat 2 tablespoons of the butter in large skillet over medium heat until melted. Simple mushroom sauce for steak, chicken, and other grilled meats. Reduce heat to medium and simmer until the sauce is reduced by at least half. Add the red pepper and shallots and gently cook until the shallots soften, about 3 minutes. While the mushroom wine sauce is reducing, heat a second large skillet to high heat, and add vegetable oil.
Place steak in large resealable plastic bag or glass dish.
Combine flour and cold water and whisk until smooth. Add the mushrooms, garlic and green onions and cook, stirring occasionally, until the mushrooms are golden. If you don't drink wine, you can use an inexpensive dry red wine. Add beef broth and simmer to reduce a bit, about 5 minutes. This was a very special dinner. The richness comes from quickly sautéed mushrooms and red wine, simmered just until the mixture begins to thicken. Turn the heat to low, stir in the butter. Cook steak as before, then set aside. Don't let it go to waste!
