Beef Tenderloin with Marsala without cookies currant

4 tablespoons butter 2 tablespoons olive oil 14 ounces white button mushrooms , sliced (can use more) 2 -3 tablespoons shallots , finely chopped (or to taste)[...]

For sauce 1 head garlic (1/4 pound; about 2 1/2 inches in diameter), left intact 1 teaspoon olive oil 3/4 teaspoon salt 2 cups heavy cream 1/4 cup drained[...]

4 lbs beef tenderloin peanut oil 3 cloves garlic , mashed into a paste with 1 teaspoon salt 1/4 cup butter 1 onion , finely chopped 2 cloves garlic , minced 3[...]