A galette is basically the hipster version of a tart.  It is imperfect to perfection, rustic to the point of being refreshingly contemporary.  And was the ultimate trend setter.  Until everybody caught on.  It also just so happens to be the easiest summer hack to entertaining.  Don’t have a tart tin?  Galette.  Don’t have perfectly just-ripe fruit or veg?  Galette.  Don’t have hours to prep?  Galette.  Don’t want to hear more reasons?  Galette.