06Butter the centers of four 12-inch squares of aluminum foil. In the center of each square, place a portion of fish fillet. On top and around it arrange shrimp, chicken and mushroom slices. Top with a pat of butter and a lemon slice. Sprinkle the sake evenly over each portion. Fold up into packets and crimp edges so each packet is tightly sealed.07Place packets on grill above coals and grill for 10 minutes. Do not turn. If using oven, bake for 15 to 20 minutes. Serve hot on individual plates with light soy sauce.