Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/2  cup           red miso
   3      tablespoons   white miso
   2                    egg yolks
   2      tablespoons   sake
   2      tablespoons   mirin
   1      tablespoon    sugar -- or to taste
     1/2  cup           dashi -or-
     1/2  cup           diluted -- defatted chicken
                        -- stock
                        optional -- (choose one)--
                        -- fresh ginger juice,
                        -- to taste
                        -- grated lemon zest,
                        -- to taste
                        -- ground toasted
                        -- sesame seeds

Preparation:

In the top of a double boiler add the misos, egg yolks, sake, mirin and sugar and whisk to combine. Place over simmering water and gradually stir in the dashi. Stir continuously until thick. Add any of optional seasonings an allow to cool to room temperature. Store covered in refrigerator for up to weeks. Bring back to room temperature before using.