Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/4  cup           soy sauce or tamari
   2      tablespoons   dark sesame oil
   2      tablespoons   rice vinegar
   1      tablespoon    minced garlic
   1      tablespoon    minced ginger
   1                    scallion -- sliced thin
                        (about 2 tbs)
                        ground black pepper to taste

Preparation:

Marinate fish for 30 minutes, turning after 15 minutes. Then grill for about 8 minutes.