Beef Tenderloin in Mushroom Sauce with butter

1/2 cup butter or margarine 3/4 pound mushrooms finely chopped 4-6 ounces smoked ham diced 1/2 cup scallions, spring or green onions minced 1/4 teaspoon salt[...]

1 (3 lb) beef tenderloin 1 tablespoon onion , minced 3 tablespoons butter 2 cups mushrooms , sliced 2 tablespoons all-purpose flour 1 cup beef broth 2[...]

1 teaspoon vegetable oil 4 tablespoons butter or 4 tablespoons margarine , divided 2 beef tenderloin steaks (1 inch thick) or 2 beef tenderloin fillets (1[...]