Ludo Lefebvre doesn’t automatically reach for the chicken stock when making this velvety leek soup. Water is optimal for clean, vegetable-focused taste; stock adds its own poultry-rich flavor, color and richness. Slideshow: More Leeks Recipes
How to Make It
Step
In a large saucepan, combine the leeks and potatoes with 6 cups of the water. Bring to a boil, season with salt and simmer over moderately low heat, partially covered, until the potatoes are tender, 20 to 30 minutes. In a blender, puree the soup in batches until very smooth. Return it to the pan and, if needed, add up to 1 cup of water to loosen. Add the cream and season with salt. Warm over moderate heat until heated through. Ladle into bowls and serve.
Make Ahead
The soup can be refrigerated overnight.