Vichyssoise Soup Recipe

Ingredients

• 3 tablespoons extra-virgin olive oil
• 4 leeks
• 2 pounds red or white potatoes
• 2 bunches watercress
• 2 1/4 quarts (9 cups) low-sodium chicken or vegetable broth
• 3/4 teaspoon kosher salt
• ground white pepper
• 1 cup half-and-half
• 1 1/2 tablespoons fresh lemon juice
• grated zest of 1 scrubbed lemon
• 2 tablespoons finely snipped fresh chives