cold cucumber soup

Ingredients

• 1/4 cup leeks, finely chopped
• 1/4 cup onion, finely chopped
• 1/4 cup celery, finely chopped
• 3 - cucumbers peeled and sliced
• - butter
• 1/4 cup sherry
• 2 cups chicken stock
• - roux, see directions below
• pinch salt
• pinch pepper
• 1/2 teaspoon sesame seeds
• 1/4 teaspoon dry mustard
• 1/4 teaspoon thyme
• 1/4 teaspoon chervil
• 1 pint light cream
• 1/4 cup orange juice