1. Combine sherry, ginger, soy sauce, molasses, lime juice, honey, garlic, sesame oil, and cilantro in a small bowl. Set aside.
2. Rinse tuna steaks and pat dry. Place steaks in a shallow glass baking dish and pour sauce over. Marinate in refrigerator for 10 min.
3. Preheat stove top grill or gas grill. Remove steaks from marinade; grill 5-8 min. on each side for well-done center (2 min. on each side for rare center and 3-5 min. each side for medium center), turning once and basting with marinade.
* Recipe Courtesy of Florida Department of Agriculture Bureau of Seafood and Aquaculture.