The only ground meat pie with a pastry crust that I'm aware of is tortiere... No pastry in Canada either, nor does that appeal. The only ground meat pie with a pastry crust that I'm aware of is tortiere, also delicious. Pot pies generally have something chunky and stewish inside (beef or chicken).
Germany never did. East Germany became communist in 1945 when the USSR ocupied it after WW II.
1. Ever since 1931 the Nazis believed, without any solid evidence, that the Communists were about to try to seize power in Germany. When a solitary Dutch Communist confessed to having set the Reichstag building on fire during a general election campaign, for the Nazis that was the start of the long awaited Communist coup attempt. Hitler persuaded President Hindenburg to declare a state of emergency and suspend most civil liberties.