I actually made this tart quite a while ago. It is a blueberry and raspberry galette. The dough recipe is from Baking with Julia. I suppose any pie dough would do. Just pile some berries or fruit of your choice in the middle of the rolled out dough, sprinkle on a little sugar and a few small bits of butter, fold the edges in a bit, brush the dough with water and sprinkle sugar on top. Then bake at 350 for about 30 minutes or until golden.