Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1                    green serrano chile -- seeded, roasted
     1/4  teaspoon      piquins
   2                    scallions, white part -- chopped
   2      cloves        garlic -- minced
     1/4  teaspoon      ginger -- minced
     1/2  teaspoon      peanut oil
     1/2  cup           broth
     1/2  teaspoon      soy sauce
   1      teaspoon      dark brown sugar
   1                    juice of 1/2 lime
     1/4  cup           peanut butter

Preparation:

Sauté the green onion, garlic and ginger in the oil, 3 to 4 minutes, until soft but not browned. (I used the micro.) Add the stock and bring to a boil. Reduce heat and stir in the remaining ingredients. Simmer until thickened (5 minutes in micro, or 10 on stove).