For tonight's showstopper, the Great British Bake Off contestants will be challenged to produce one of the great party foods, vol-au-vents.Having already tasked the bakers with producing a frangipane cream tart and a cheese flaoun from Cyprus, hosts Mary Berry and Paul Hollywood will test their ability with this 70s canapé. Feeling inspired by the show? Why not give this famous old puff pastry a go.Ingredients:500g pack of puff pastryPlain flour, for dusting1 egg yolk mixed with 1 tbsp...
