Pastry chef Aran Goyoaga is known for her exquisite gluten-free recipes for everything from puff pastry to chocolate cake. Here, she offers up a rustic galette featuring a gluten-free mainstay: buckwheat, an earthy-flavored rhubarb relative that works really well with any sort of fruit. This crust is crisp, flavorful, and versatile. The fact that it’s gluten-free? That just sweetens the deal.