So OK, we know "peachberry" isn't really a word. But we just couldn't resist making it up, since it evokes so perfectly the wonderful harmony of peaches with any type of berry. This dense-yet-tender cake, with layers of both peaches and berries right in the batter, is topped with cinnamon-y streusel. Enjoy it warm, as a breakfast coffeecake; or à la mode, for dessert. It's a winner any time of the day.