1 In A Small Saucepan, Bring The Soy Sauce, Marmalade, Honey, Rice Wine Vinegar, And Red Pepper Flakes To A Simmer Over Medium Heat. Remove From The Flame And Let Cool To Room Temperature. Distribute The Glaze Evenly In 2 Bowls. Marinate The Tenderloin Roast For A Min Of 1 Hour In The Glaze. 2 Heat The Grill To 350