Rolling out galette dough is a simple process that requires only a few steps.  First, remove the dough from the fridge to sit at room temperature for a few minutes.  Then, set the dough on a lightly floured surface and use a rolling pin to roll it out into a rough circle.  Rotate the dough as you roll it out to make sure the dough is even and doesn’t stick to the surface.  Once you have finished rolling the dough, you are ready to add the filling, fold the edges over the filling, brush the edges with an egg wash, and bake.