Mary Calombaris was the first MasterClass guest into the kitchen, showing George and the contestants a thing or two about making a moussaka. Peter and Alana enjoyed a private MasterClass with pastry chef Vincent Gadan, who took them through making sweet dough and a selection of delicious tarts.Gary prepared a beautiful lamb three ways dish, while the final guest Christine Manfield wrapped up the week by cooking a stir-fried turmeric squid.