Preserving Floyd: Leek and Potato Soup

The leeks and potatoes are coming in now.  We grew leeks for the first time this year and I've been using them straight out of the garden for the last month but last weekend it was time to harvest the whole bed.  I don't know if it's possible to cure and cellar leeks like onions, garlic and shallots, but it became a moot point when I realized this year's potato harvest was also starting to come in.  Marco Pierre White says look around and see what else is mature and edible at the same time as what you're foraging or hunting for flavor pairings and that good advice holds true in the garden.  What's more classic than leek and potato soup?  And leek and potato soup can also be the base for more elaborate soups, stews and chowders with just a few easy additions.