Preparation Place beans in heavy large pot. Add enough water to cover beans by 2 inches. Soak overnight. Drain beans. Heat olive oil in heavy large pot over medium-high heat. Add onion, leek, tomato, carrots, celery, garlic and bacon and sauté until vegetables are tender, about 6 minutes. Add beans, 10 1/2 cups chicken stock, chopped thyme and rosemary. Bring soup to boil. Reduce heat to medium-low; cover and simmer until beans are very tender, stirring occasionally, about 1 hour. Working in batches, puree soup in blender until smooth. Return soup to pot. Add 1/2 cup whipping cream. Add more chicken stock by 1/4 cupfuls to thin soup, if desired. Season soup to taste with salt and pepper. Ladle soup into 8 bowls. Lightly drizzle top of each with white truffle oil, if desired. *White truffle oil is available at Italian markets, specialty foods stores and some supermarkets nationwide.
Preparation Place beans in heavy large pot. Add enough water to cover beans by 2 inches. Soak overnight. Drain beans. Heat olive oil in heavy large pot over medium-high heat. Add onion, leek, tomato, carrots, celery, garlic and bacon and sauté until vegetables are tender, about 6 minutes. Add beans, 10 1/2 cups chicken stock, chopped thyme and rosemary. Bring soup to boil. Reduce heat to medium-low; cover and simmer until beans are very tender, stirring occasionally, about 1 hour. Working in batches, puree soup in blender until smooth. Return soup to pot. Add 1/2 cup whipping cream. Add more chicken stock by 1/4 cupfuls to thin soup, if desired. Season soup to taste with salt and pepper. Ladle soup into 8 bowls. Lightly drizzle top of each with white truffle oil, if desired. *White truffle oil is available at Italian markets, specialty foods stores and some supermarkets nationwide.