It's the third week of the heats, and five ambitious chefs from across the country begin their bid for the title with the first challenge - the Signature Dish Test. The professional chefs have just one hour to cook a stunning plate of food that truly showcases their talent. This could be their only chance to impress the judges as after the test, one chef will be sent home. Next, the remaining four chefs face Monica's Skills Test. Monica and Gregg ask each chef to showcase their pastry skills by making Monica's version of the French pastry, millefeuille. They must use their culinary skills and knowledge to first create caramel tuiles before using them to build a perfectly formed millefeuille with crème patissiere and raspberries, all in just 20 minutes. Finally, the chefs face Michelin-starred legend Marcus Wareing with his version of the infamous Invention Test. Marcus cooks roast lamb, mint and radish, but this is no simple dish. Once Marcus has shown the viewers how, he cooks his stunning shoulder of lamb. The chefs then have just ten minutes to compose and one hour to cook a spectacular lamb dish, which will prove they are worthy of a quarter-final place. Marcus is joined by Monica to decide who must go home and who has the culinary talent to continue in the competition.