Purée of Winter Vegetable Soup

Preparation

1. Step 1

   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.

2. Step 2

   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.

3. Step 3

   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.