A galette in French, a crostata in Italian, use either name to refer to this rustic pocket of strawberries and peaches. Where tarts and pies assume the form of their pan, the galette takes shape as you pleat and fold thinly rolled dough around its filling. As it bakes in the oven, the crust will become flaky, the fruit will bubble, and some may even nestle into a buttery fold or spill over the side. Not to worry. Neither a galette nor a crostata will be ruined by a bit of bubbling strawberry juice that escapes. If you peek through the oven door, you might even catch these little eruptions.…