This story, told by a Parisian restaurateur, is made up: "I used to hunt around Lamotte-Beuvron in my youth, and had discovered in a very small hotel run by elderly ladies a marvelous dessert listed on the menu under tarte solognote. I questioned the kitchen staff about its recipe, but was sternly rebuffed. Undaunted, I got myself hired as a gardener. Three days later, I was fired when it became clear that I could hardly plant a cabbage. But this was long enough to pierce the secrets of the kitchen. I brought the recipe back, and put it on my own menu under "Tarte des Demoiselles Tatin". However, it describes the genesis of a real recipe. WHAT FRUIT plays a prominent role in this recipe?