Peel away plastic wrap and invert dough to floured work surface. Peel away second piece of wrap. Fold dough in thirds in the width, folding the top third down and the bottom third up, to make a 6 by 18-inch rectangle, then roll up the dough from one of the 6-inch ends, making sure to roll end under dough. Press the dough into a square, wrap in plastic and refrigerate 1 hour, or until firm.