Old Rag Pie is not the most glamorous name for something which, while being incredibly simple to make, will have you, and anyone who eats it, in raptures. The name is the English translation for the Greek Patsavouropita, created by bakeries as a way of using up old scraps of filo pastry: the "old rags" indicated by the title. In Greece, there are two variants, one sweet, one savoury, but this version merges the two, adding honey to salty feta, to create what I can best describe (in taste terms) as a Greek cheesecake.