Directions

• In a large bowl, combine the sherry, soy sauce, soup mix and brown sugar. Pour 1 cup into a shallow dish; add tenderloin and turn to coat. Cover and refrigerate for 5 hours or overnight. Cover and refrigerate remaining marinade.
• Preheat oven to 425°. Drain and discard marinade. Place tenderloin on a rack in a shallow roasting pan. Bake, uncovered, 45-50 minutes or until meat reaches desired doneness (for medium-rare, a thermometer should read 135°; medium, 140°; medium-well, 145°), basting often with 1/3 cup reserved marinade. Let stand for 10-15 minutes.
• Meanwhile, in a small saucepan, bring water and remaining marinade to a rolling boil 1 minute or until sauce is slightly reduced. Slice beef; serve with sauce.