In the Miniatures Challenge, the teams are asked to produce 36 opera slices, 36 babka knots - a handcrafted breakfast pastry - and 36 petits gateaux in the shape of a sphere, invented by the teams themselves. Each item in each batch must be uniform in appearance, finished to the very highest professional standards and of course utterly delicious. They have just three hours to make all 108 pastries. In the Showpiece Challenge, the team are asked to reinvent a popular British dessert as a fine-dining experience and present it as a dazzling showpiece display. The humble dessert getting the five-star makeover this week is trifle.