Vichyssoise

2 cups finely diced raw potatoes
4 tablespoons butter
6 leeks, cleaned and cut into 1 inch pieces
3 cups chicken bouillon
1 teaspoon salt
1/2 teaspoon freshly ground black pepper
a dash of nutmeg
11/2 to 2 cups sour cream or heavy cream
Chopped chives

Cook the potatoes in salted water to cover until just tender. Melt the butter in a skillet and cool the leeks gently, tossing them lightly, for a few minutes. Add the chicken bouillon and bring to a boil. Lower the heat and simmer the leeks until tender. Add the potatoes to the leeks and the broth and season to taste with salt, papper and nutmeg. Put this mixture in the blender (you will need to blend it in two lots) and blend for 1 minute, or until smooth. Chill. When ready to serve, mix in sour cream or heavy cream. Garnish with chopped chives.