Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      pound         butter
   4      tablespoons   chopped scallions
   2      tablespoons   minced ginger
   1      tablespoon    rice wine vinegar
                        salt and freshly cracked black pepper

Preparation:

Use softened unsalted butter. Mix ingredients in blender or by hand. Do not let butter melt. Roll up compound butter in plastic wrap and freeze until needed. When ready to grill, cut off a small pat for each portion of fish to be grilled.