The bakers are one step closer to the final, but Pastry Week will test their skills like never before. In the Signature, they tackle a tarte Tatin, a caramelized French classic. Then, they face a Technical that demands finesse with a fancy French pastry. Finally, the Showstopper asks for a decorative vertical pie whose layers tell a story through design and flavor. Only the bakers who master these pastry challenges will earn a place in the all-important semifinal.