The second group of amateurs get their first taste of professional cooking. They are heading to Sartoria in London's Mayfair, run by renowned Italian chef patron Francesco Mazzei. The six contestants are responsible for serving up every dish on the menu to paying customers during a packed lunch service. Then it is back to MasterChef HQ for an invention test for John and Gregg. In a last-chance bid to stay in the competition, each cook has to show they have learned from their experience and can create a unique and outstanding dish worthy of gracing the table of a restaurant. Guest judge two Michelin-starred Nathan Outlaw returns to help John and Gregg evaluate the six amateur cooks' dishes After this challenge, one of the contestants is sent home.