2 or 3 leeks, (chop off the dark green tops, then slice the bottom white and 2 inches of light green part), put ina colander to get all the sand out (easier to get the sand out when it is chopped).
1 tbsp oil
4 medium potatoes
3 cups broth
1.5 cups soy milk (or milk)
pepper to taste
Saute the chopped leeks in oil until soft. Add broth and chopped potatoes. Bring to boil and simmer about 20 minutes.
Then add 1.5 cups soy milk and heat through. Blend about 2/3 of the soup until smooth. (I used a hand blender - I love that thing for soup!)