1950s-1960s

Italian migration to Ontario, and the pizza Canada gave the world

Post-war Italian migration to southern Ontario produced a distinct Canadian pizza tradition — Windsor's shredded-pepperoni-and-canned-mushroom style among others — and, in Chatham in 1962, the single most internationally argued-about pizza ever created.

Generally acceptedEmigration of people

From and to

Origin

Country:: Italy
Region:: Southern Italy

Destination

Country:: Canada
Region:: Ontario
City:: Windsor
Community:: Italian-Canadian

Well-documented single route

Sources broadly agree on one route of transmission, and it is documented rather than inferred.

What changed on arrival

Ingredient substitution
Windsor-style pizza is defined by shredded pepperoni (so every bite has some) and canned mushrooms (which burn less than fresh) — local conventions now defended as the style's identity.
Generally accepted
- Windsor-style pizza — Wikipedia
- History of "Windsor Style" Pizza — Windsor Public Library
Reinvention beyond the origin tradition
Hawaiian pizza — canned pineapple and ham — was created by Sam Panopoulos, a Greek immigrant to Canada, at the Satellite Restaurant in Chatham, Ontario, in 1962. Neither the name nor the concept has any Hawaiian or Italian origin.
Generally accepted
- Hawaiian pizza — Wikipedia

Authenticity tension

Pineapple on pizza is the most widely-argued pizza question in the world and is almost always framed as an insult to Italian tradition. Its actual origin — a Greek immigrant in Ontario adapting a cheap canned ingredient — is a migration story, not an Italian one.

How PizzaHQ handles authenticity questions