To make the crust: Preheat oven to 425° F. Dust cutting board lightly with flour. Unroll thawed dough on cutting board. Whisk together the egg and water. Brush a thin layer of egg wash over the dough. Sprinkle cinnamon sugar over top. Cut dough into 12 equal wedges. Place on parchment lined baking sheet. Bake for 8-10 minutes until golden brown and crisp. Remove and allow to cool completely.