Puree the soup in a blender in batches, being careful to remove and discard the bay leaf. Return the soup to a soup pot and keep warm over low heat. Season with salt and pepper.
03In a medium bowl fold in the lemon zest and the remaining teaspoon of rosemary to 2/3 cup creme fraiche. To serve, ladle the soup into bowls and dollop each bowl with the lemon rosemary creme fraiche. Serve immediately.