Jimmy Doherty hosts a Christmas party at his farm, and the team investigates the secrets behind the food that will be on people's tables over the holiday period. Amanda Byram exposes the surprising truth about turkey crowns, Kate Quilton shares the trick to making the ultimate Christmas cake, Briony Williams investigates the classic starter of prawn cocktail, and Matt Tebbutt finds out just how they get the cranberries into fruity cheese.