There's a kind of magic in a summer recipe that you can make wherever you are, provided that wherever you are has, say, flour, butter, an oven and whatever fruit is most glorious is at that very moment. This strawberry shortcake is so simple that you can make it within the hour, and so satisfying that it may become your go-to for summer, the recipe you keep in your back pocket. Strawberries are the classic choice, but this would also be heavenly in high summer with very ripe peaches or any other juicy, macerated fruit. —Nancy Harmon Jenkins