Ingredients

  • 1 tablespoon extra virgin olive oil
  • 1 medium onion, chopped
  • 1/2 pound leeks 1 large or 2 small, white and light green parts only, cleaned well and sliced
  • 1/2 pound carrots 2 large, peeled and sliced
  • 1/2 pound kohlrabi, trimmed, peeled and diced
  • 1/2 pound turnips, peeled and diced
  • 6 ounces potatoes 2 medium, peeled and diced
  • 1 1/2 quarts water, chicken stock or vegetable stock (see note)
  • 2 fat slices ginger, peeled
  • 1 bay leaf
  • A couple of sprigs each thyme and parsley
  • 12 peppercorns
  • Salt
  • freshly ground pepper to taste

Method

  • Heat the olive oil over medium heat in a large, heavy soup pot or Dutch oven.
  • Add the onion.
  • Cook, stirring, until it begins to soften, about three minutes.
  • Add the leeks and a generous pinch of salt.
  • Cook, stirring often, until tender but not browned, about five more minutes.
  • Add the carrots, kohlrabi, turnips, potatoes and water or stock.
  • Bring to a boil.
  • Meanwhile, wrap the ginger, bay leaf, thyme, parsley and peppercorns in cheesecloth.
  • Tie them up to make a bouquet garni, and add to the pot.
  • Add salt to taste (about 2 teaspoons), reduce the heat, cover and simmer one hour.
  • Remove the cheesecloth bag, and discard.
  • Blend the soup until smooth with an immersion blender or in batches in a regular blender.
  • (Do not put the top on tight; cover the top with a towel to prevent hot splashes.)
  • Pour the soup through a strainer into a bowl; press the soup through the strainer with the back of a ladle or with a pestle.
  • Return to the pot and heat through.
  • Add lots of freshly ground pepper, taste and adjust salt, and serve.