In A Bowl, Combine The First Six Ingredients; Beat Until Smooth. Spread On Both Sides Of Each Slice Of Bread; Reassemble The Loaf. Wrap In A Large Piece Of Heavy-Duty Foil (About 28 In. X 18 In.); Seal Tightly. Grill, Covered, Over Medium Heat For 15-20 Minutes Or Until Heated Through, Turning Once.