Smoked meat sandwich from Quebec

There are signs all over French Canada proclaiming smoked meat. They are not inaccurate. This sandwich had two types of meat, I think beef and ham, with mustard on lightly toasted bread. It was cut very thinly, but built up in many layers. I need to become friends with the ham slicing lady in the single remaining unpretentious butchers in London (in Chrisp St market, tower hamlets). In fact, I need to visit her today.