Photo Illustration by Erin O’Flynn/The Daily Beast/British Bake OffIn this season of The Great British Baking Show, one contestant has won over half of the technical challenges, proving—no pun intended—that he’s the one to beat. With that track record heading into this week’s challenge in Pastry Week, all eyes were on Dan as the bakers were asked to make dauphinoise pithiviers. The pressure was on. Blood was shed—literally.(Warning: Spoilers ahead.)What is a dauphinoise pithivier, you ask? Pithi