Parmentier Soup

Potage à la Parmentier : instructions

• 1
  Peel the potatoes, leek, and onion; wash them.
  Cut the vegetables into small pieces.
• 2
  Place the vegetables and water in a large pot; season with salt and pepper.
  Bring to a boil; cover and simmer for 1 hour.
• 3
  Once the soup is done cooking, purée it in a food mill or blender; return the soup to the heat.
• 4
  Warm a soup tureen; heat the milk in a small saucepan.
  Pour the warm milk into the soup tureen; add the butter; stir.
• 5
  Pour the boiling soup over the milk and butter mixture.
  
  If you have chervil on hand when making this soup, you can finely chop a few sprigs and sprinkle them over the soup just before serving: it will taste even better.