Potato and Leek soup (not good for those with indigestion)

1kg potatos
2 leeks
Powdered Chicken stock (I use Masels)

Peel and cut potatos into cubes. Chop up the white part of the leeks.
Fry leeks in about a tbs of butter, salt and pepper. Use a deep sauce pan
Add potato cubes to butter mixtue. Toss potatos around to cover.
Add just enough stock to cover potatos.
Boil until tender. Blend with stick blender.
Season to taste

Add a soon of sour cream to each bowl of soup.