I'd really welcome some opinion on this, and where I might find further information.
When you order steak and ale pie off the menu (or indeed any pie), what are you expecting to receive? I am expecting, or at least hoping to see a pie that has a top, sides and base. That to me is a pie. How can a ceramic dish balanced on a dinner plate, containing the heated up insides of a pie, with a seperately cooked lid placed on the top at the last minute, possibly be classed as a pie? Further more, these types of 'pies' served in this manner, make it very difficult for the pie to be interactive with accompanying veg and mash.
There is something very wrong in trying to eat out of a small bowl on a plate. Surely a pie should have top, sides and base, and the whole thing cooked as one, so that it all intermingles during cooking?