Flour a large piece of parchment paper or a silicone mat with tapioca flour. Roll out each dough piece with a lightly floured rolling pin into a circle shape.
If there are cracks, you can help fix them with your fingers. However, it doesn’t have to be perfect. Then transfer the parchment paper to a large baking sheet.
You can eat the vegan galette warm or at room temperature alone, with some whipped coconut cream, topped with a scoop of coconut or vanilla ice cream and/or a drizzle of caramel sauce!