Combine Sherry, Gingerroot, Soy Sauce, Honey & Garlic in A 1 Cup Glass Measure. Microwave Uncovered At High 1 Min. OR Until Mixture Boils. Cool Slightly. Pla ce Tuna in An 11 X 7 X 1.5 in. Baking Dish. Pour Marinade Overtuna. Cover & Chill 2 Hours. Remove Tuna From Marinade, Reserving Marinade. Preheat A 10 Inc h. Browning Skillet At High For 8 Min. Arrange Tuna On Hot Browning Skillet Wit h Thickest Portions To Theoutside. Microwave Uncovered At High For 2 Min. Turn Steaks Over & Baste With Marinade. Microwave At High For 1.5 To 2 Min. Let Stand Covered 2 Min. Serve Immediately With Warm Marinade. (May Also Grill Outdoors.)