Preheat oven to 400 F. Line a large baking sheet with parchment paper. Unfold the thawed puff pastry onto the parchment. Roll slightly to smooth out the creases. Using a sharp knife, gently score a 1/2″ border around the perimeter of the dough without cutting all the way through. Prick the center area all over with a fork to prevent bubbling. Brush the outer border, ONLY, with the egg wash. Bake for 10 minutes or until it BEGINS to turn LIGHT golden brown.