Sopa de Aguacate y Papas

Ingredients

 * 3 leeks, white part only and sliced thinly
 * 2 Medium Potatoes, peeled and sliced thinly
 * 3 c Vegetable or Chicken Stock
 * 1 c Heavy Cream
 * Salt and Pepper to taste
 * 2 Avocados -- mashed

Directions

 * Heat stock in a medium saucepan and add leeks and potatoes.
 * Boil for about 20 minutes.
 * Puree in blender, then return to the saucepan and stir in the heavy cream.
 * Puree avocado in blender.
 * Stir in the avocado just as you're ready to serve, as heat embitters the avocado.
 * Serve with minced chives or cilantro.