MasterChef Australia Fans and Favourites challenge this episode was Matt Stone Immunity Challenge— Aldo, Alvin, Michael, Billie, Julie, Minoli and Melanie competed against guest chef Matt Stone for one of seven immunity pins. They had 75 minutes to cook a dish highlighting one of the following controversial ingredients: licorice, blue cheese, Brussels sprouts, coriander, oysters, and pineapple.