Pureed Vegetable Soup

Preparation:

Preparation: All vegetables are good for this soup. Don't miss a leek and a handful of spinach. When everything is cooked, pass through a vegetable mill or through a sieve, put it back in another saucepan with a good chunk of butter and serve with grated Parmesan. remember that many, many vegetables are needed as the soup should look like a rather thick cream.