NYT Cooking: Pierre Hermé, France’s most celebrated pastry chef, has created a family of desserts called Ispahan, named for the ancient city in Persia that was famous for roses. Each of the almost 40 members of the clan include the flavors of roses and raspberries and many include lychees, too. They’re all memorably aromatic and their flavors are haunting. This sablé, a French shortbre...