This week's seven remaining home cooks return to test their culinary wits and show judges John Torode and Gregg Wallace that they have the potential to be MasterChef Champion 2023.Their next challenge is the most difficult so far - cooking a dish to a brief set by one of the country's toughest food critics, William Sitwell. William wants them to prepare a dish inspired by their favourite celebrity chef.Then, one more challenge remains in which to earn a place in this week's quarter-final. With just four places up for grabs, the contenders must each cook a dish with layers. Who will handle the pressure and show they have what it takes to progress further in the competition?