Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  6                     tuna steaks -- cut 1-inch thick (8
                        to 10 ounces each)
                        guacamole filling
  1              large  shallot or 1/8 onion -- peeled (2
  1         tablespoon  minced)
  2                     garlic cloves -- peeled
  1              small  avocado -- peeled and pitted
  1         tablespoon  plus1 teaspoon fresh lemon juice
     1/2      teaspoon  worcestershire sauce
                        salt to taste
  2        tablespoons  butter or margarine
                        marinade
     1/3           cup  soy sauce
  3        tablespoons  fresh lemon juice
  1              clove  garlic -- minced
  2          teaspoons  dijon mustard
  3        tablespoons  vegetable oil
  3        tablespoons  dry sherry

Preparation:

Holding the knife parallel to the work surface, make a pocket in the fish by cutting through the center as far back as possible, leaving back and sides attached to make a pocket. In a food processor with the metal blade, process shallots and garlic until minced. Add avocado, lemon juice, Worcestershire sauce, butter and salt; process until pureed. Divide filling among fish, about 2 tablespoons per steak, spreading it towards the back and pressing gently on fish to make it even. Mix all ingredients in bowl or jar. Place fish close together in a shallow glass dish, pour marinade over and turn to coat both sides. Cover and refrigerate for 2 to 4 hours. Prepare coals and oil grill rack. Remove fish from marinade and grill 3 to 4-inches from hot coals for 4 to 5 minutes per side or until cooked through. Prep Time: 20 minutes Cook Time: 8 to 10 minutes Makes: 8 servings Prep Notes: 2 to 4 hours Cut a pocket in the middle of tuna steaks and fill them with guacamole. Besides tasting great, it reduces the risk of overcooking the fish. This preparation is also terrific with swordfish.

Nutritional Information:

2494 Calories (kcal); 145g Total Fat; (53% calories from fat); 249g Protein; 32g Carbohydrate; 450mg Cholesterol; 6295mg Sodium