Wash and pat dry your apples. Using the mandoline (Setup on #1), thinly slice your apples, then remove the core and slice them in two. Set aside.
Place your Medium bonMAT™ on the top of your Medium Perforated Baking Sheet.
Roll the puff pastry directly onto your bonMAT™ into a large rectangle.
Gently spread your apple sauce on the top of your puff pastry. And sprinkle the Demerara sugar on top.
Arrange your apples slices on top. Sprinkle with Vanilla Sugar.
Finally evenly grate your butter on the top of your apple tart.
Bake for 25 minutes at 400F/200C. (Every oven heats differently, monitor your tart from 20min)
Once your apple tart is out of the oven, slide it onto your service plate. Enjoy warm or at room temperature with your Favorite Vanilla Ice Cream. Bon Appétit!