What would a Shepard's pie or cottage pie be classed as?
A fair point, they have no pastry topping or base so don't meet my definition. However, they ARE a filling and topping combination, which a pizza still is not.
I'm still not gonna give on pizza's being pies. That's just an Americanism, and we all know we can't trust you guys on pies. You make sweet pumpkin pies and those things are VILE!