Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      cup           warm water
   1                    vegetable bullion cube -- or
   1      tablespoon    miso paste
   2      tablespoons   light soy sauce
     1/4  teaspoon      Chinese 5-spice mix
   1      tablespoon    corn starch
                        couple of dashes of sesame oil -- (optional)

Preparation:

Dissolve the corn starch in a few tbs of warm water, then mix all ingredients together. Pour over the stir fry in the last minute or so, stir until the cornstarch thickens. *light soy sauce has much less salt than regular; some prefer the saltier flavor of standard soy. I like to be able to get more of the soy flavor without getting overwhelmed with salt.