Take two big fat leeks, wash them, chop them up (green tops and all) and soften them in a tablespoon each of hot butter and olive oil. Add a chopped onion and three whole garlic cloves. Let them saute for a while in the oils, then add two large chopped potatoes, stir them around until they start to get a bit soft, then add 4 cups or so of chicken or vegetable stock, and 1 cup of good white wine. Simmer the whole thing for half an hour to 40 minutes, until everything is nice and soft and blendable, then puree it - I use my handy dandy hand blender. Add your choice of cream (if you're not counting calories, it's the best, but rich), or milk, or I like evaporated skim milk with a dollop of creme fraiche or sour cream when serving. After adding about a cup of the dairy product, whatever you choose - heat again but don't boil, and serve. Yum yum.
lilyfriend: if you're reading this, without the cream, it would be good for what ails you. Better than chicken soup :) And keeps vampires away, too (if all you Buffy fans want to do that, that is...)