Combine all ingredients, except mahi mahi, in large bowl, stir with wire whip until well-mixed. Place fish in a shallow pan and pour marinade mixture over the top. Let stand for 2 to 3 hours in the refrigerator.
Mahi mahi can be grilled or sautéed. Grilling is preferable, as it brings out more flavor. If grilling, remove fish from marinade and place on grill, cook until desired temperature is reached. If sautéing, remove from marinade and place in sauté pan with a touch of oil. Cook until fish is golden brown.