Beef Tenderloin Deluxe

1 whole beef tenderloin, about 3 pounds
4 tablespoons butter, softened, divided
1/2 cup chopped onions
4 teaspoons soy sauce
2 teaspoons Dijon mustard
1/8 teaspoon pepper
1 cup dry sherry

Spread tenderloin with 2 tablespoons butter.  Put on oven rack in a shallow baking pan.  Bake, uncovered, in a preheated 400-degree oven for 20 minutes.

Meanwhile, in a 1-quart saucepan, cook onions in 2 tablespoons of butter until tender.  Add soy sauce, mustard, and pepper. Stir in sherry. Heat to boiling and pour over tenderloin.

Bake 20 - 25 minutes more for rare beef.  Use a meat thermometer. Baste frequently with sauce.  Serve sliced with sauce.

8 servings