Thaw in refrigerator.
Broil or Grill: Broil or grill Mahi Mahi steaks approximately 5-7 minutes per side. Thicker portions may take slightly longer. They are done when the steaks are opaque throughout. Baste with butter when cooking, if desired. As with any fish, for a flaky, moist entree, avoid overcooking. Use a mixture of 1 Tbsp. of butter and 1 tsp. lemon juice to accompany your steaks.
Microwave: Arrange two Mahi Mahi steaks in a baking dish. Brush steaks with butter and lemon juice. Cover with plastic wrap, venting one corner. Microwave for 3-4 minutes. Turn steaks over. Brush with butter; cover. Microwave 3-4 minutes or until fish is opaque throughout.