1 ½ Pounds Tuna Steaks Vegetable Cooking Spray Marinade 3 Tbsp Pineapple Juice 1 Tbsp Fresh Ginger, grated ½ Tsp Dry Mustard 3 Tbsp Soy Sauce 2 Cloves Garlic, minced 2 Tbsp Lime Juice 1 Tsp Brown Sugar Combine marinade ingredients in a nonmetallic dish. Reserve 2-3 tablespoons for basting. Add tuna. Marinate 15-20 minutes, turning once. Drain fish from marinade. Coat fish with cooking spray. Grill over hot coals 3 minutes. Turn. Brush with reserved marinade. Cook an additional 4-5 minutes.