Some highly rated marinated ahi tuna recipes are the Marinated Seared Tuna recipe from Food Network and the Marinated Tuna Steaks recipe from AllRecipes. The marinade for the Food Network recipe combines soy sauce, rice wine vinegar, sambal oelek, sliced scallions, garlic and fresh ginger.
To make the marinade for the AllRecipes tuna steaks, combine 1/4 cup orange juice, 1/4 cup soy sauce, 2 tablespoons olive oil and 1 tablespoon lemon juice with 2 tablespoons chopped parsley, a minced garlic clove and 1/2 teaspoon chopped oregano. Allow the tuna steaks to marinate for in the refrigerator for at least 30 minutes. Prepare the grill by turning it up to high heat and oiling the grates. Grill the tuna steaks for five to six minutes on each side.