Personally, I think it sounds good if you call it a pineapple and ham pie, because pizza is a specific Italian dish, not a culinary catch-all. But that’s a never-ending debate 🤷🏻♂️😄
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That wouldn't work though, because a pie is a pastry base dish served with various filling and covered by another layer of pastry...try putting an extra pizza base on top of a pizza and all you get is a big doughy sandwich 🥪😆 I've seen an American refer to a pizza as a pie before but I put that down to poor education or something...I think it was Ryan Reynolds in Deadpool, in fact...