Potato Leek Soup

This soup has two lives. Served hot, the French call it potage Parmentier, named for the man who convinced a skeptical nation that potatoes were fit for human consumption. Served cold, it becomes vichyssoise, supposedly invented at the Ritz-Carlton in New York by a homesick French chef who remembered how his mother cooled her potato soup on summer evenings. Both stories are probably embellished. The soup itself needs no mythology.

What it needs is good leeks. Truly good leeks, the fat white stalks with just a whisper of pale green, sweated in butter until they surrender every trace of sharpness and become something closer to candy. This takes time. Most recipes rush this step and produce soup that tastes thin and vegetal. Give your leeks twenty minutes of gentle heat and they'll reward you with depth you cannot achieve any other way.

The potatoes matter too, though less than you might think. They provide body and that characteristic silky texture, but they're supporting actors here. Yukon Golds work beautifully, their golden flesh adding subtle richness. Whatever variety you choose, cut them uniform so they cook evenly and puree without leaving grainy pockets.

I've taught this soup to countless students who arrived convinced that French cuisine required culinary school and left knowing they could produce something genuinely elegant from ingredients found at any grocery store. This is peasant food refined by technique, nothing more. The technique is simple. The result is sublime.