Prepare your mise en place.
Line the pan with parchment paper.
Lightly flour a clean, flat work surface. Place the dough in the center of the floured surface and, using a rolling pin, roll it out to a rectangle about 3 millimeters (⅛ inch) thick and large enough to fit the half-sheet pan. Using a pastry brush, lightly brush off the excess flour.
Lift the dough gen