Schwartz's is arguably the most famous deli in Montreal. It's menu proudly lists a who's who in entertainment, including Celine Dion - who I hear is now a part-owner of this iconic albeit overly touristy restaurant.
Expect to queue for a while (though it moves quickly) with the hordes of tourists to grab a seat at one of a dozen or so shared and packed tables in a chaotic and rather run down dining room. Sounds delightful, ha, not really, but oh does that sandwich make up for the pain of the experience.
The smoked meat, which is similar to American corn beef or British salt beef, is delicious. My sandwich overflowed with meaty goodness. It was the perfect mix of fat and lean meat served on smallish pieces of rye bread and some mustard. The beef was so tender it easily fell apart and I wound up eating it with a fork! There are other Jewish "inspired" dishes on offer (it is unclear if this place is kosher, I assume it is not), but almost everyone went with the smoked meat.
Swartz's serves some of the best deli sandwiches I've had and can easily match anything you'd find in a deli-mecca like NYC. Definitely worth a trip!