4 (4 ounce) tuna steaks
1 small onion, thinly sliced and seperated into rings
1/2 cup white wine vinegar
1 tablespoon and 1 teaspoon sugar
2 teaspoons dried mint
1/2 teaspoon salt
1/4 teaspoon pepper

Place tuna and onion in a shallow baking dish. Combine vinegar and next 4 ingredients and pour over tuna and onion. Cover and marinate in the refrigerator about 2 hours, turning tuna occasionally. Remove tuna from marinade and place marinade and onions in heavy duty foil and seal tightly.

Coat grill of barbecue with cooking spray and place over medium-hot coals or medium heat. Place foil packet on grill and cook about 15-20 minutes or until onion is tender- turn packet frequently. Place tuna on the grill and cook for 6-8 minutes on each side or until fish flakes easily. Serve tuna steaks with onion and marinade mixture spooned on top.

Makes 4 servings
Serving Size: 4 ounces tuna and 1/4 onion