Black Bean Soup

Ingredients

• 1 lb. black beans
• 3 qt. water
• 2 tsp. salt
• 1 tsp. coarsely ground black pepper
• 1 large onion
• 1 stalk celery with leaves, chopped
• 2 large cloves garlic
• white part of 1 leek
• 1/4 c. salad oil
• 1 large bay leaf
• 1/2 c. Madeira or sherry
• 2 lemons, thinly sliced
• sour cream