Plot: David Blom, pastry chef at Chef Allen's Restaurant in North Miami, shows Julia how to bake traditional Polish cakes known as babas and savarin. He uses a single recipe to create the spongy dough; sweetens it further by soaking it in a sugar syrup after baking; flavors the cakes with a variety of liqueurs, including rum, kirsch, and champagne; and garnishes with fresh fruits, whipped cream, and a homemade custard flavored with vanilla bean