Overview: As the final four chefs near the end of their journey in Portland, Padma is joined by Vitaly Paley and Gregory Gourdet to introduce an old school Quickfire Challenge paying homage to the Oregon Trail. For the Elimination Challenge, legendary chef and special guest Massimo Bottura tasks the chefs to pull inspiration from his famous parmigiano reggiano dish and create delectable dishes utilizing cheddar five different ways. To gain inspiration, the chefs embark on a tour of the Tillamook Creamery. Dale Talde and Ed Lee serve as this week’s guest judges and help determine which three chefs move forward.