This decadent soup is a favourite dish at the Michelin starred restaurant Bistro Jeanty in Napa Valley. It is an impressive and delicious soup - perfect for a dinner party! For an everyday meal, omit the puff pastry dome. The recipe was printed in "Soup's On!: 75 Soul-Satisfying Recipes from Your Favorite Chefs". Start this recipe in advance as the soup must cool fully before baking. For a little extra oomph, you can add 2 tablespoons of sherry to the soup.