Mushroom And Fennel Soup / Fennel and leek soup 1 heaping cup finely chopped fennel bulb (finocchio) 1/2 cup grated carrot 2 medium leeks, chopped 1 clove garlic, chopped 3 tablespoons olive oil 1 vegetable bouillon cube 3 cups water 2 teaspoons butter 2 teaspoons flour 1 cup milk salt and freshly ground black pepper to taste.