The Greeks love their pies almost as much as we or the Aussies do, but theirs are made by building up thin sheets of filo pastry. This chicken pie was sensational, made by a mother-and-daughter team, Iro and Virginia Papapostolu, in the village of Aspraggeli in the region of Zagori, a mountainous part of Epirus. The pie is made from a whole chicken. The chicken and onions are first poached, and the liquid then reduced to a gelatinous sauce. It is the sweetness of the onions that really count...