Allow 10 minutes of cooking time per inch of thickness on thawed product; 20 minutes per inch on frozen product. Bake: Place tuna in baking dish in a preheated oven at 400°F. It is not necessary to turn fish during cooking. Grill: Place tuna on well greased grill a few inches above hot coals. Turn once halfway through cooking time. Sauté: Sauté tuna in oil, butter or margarine over medium high heat. Turn fish for even browning halfway through cooking. Broil: Broil tuna 4 inches from heat. Brush fish with oil, butter, margarine or marinade several times during cooking.