Joe Beef is really freakin' good. It's been about 2 months since I've eaten there while vacationing in Montreal and I still think fondly back on it.
The menu rotates pretty often - but for what it's worth - we grabbed the whole flounder with lobster bisque gravy (came with a side of mussels and lobster cream sauced veggies), slow-cooked lamb neck with sausage, seared scallops and foie gras parfait.
Other than the scallops (which was fresh and perfectly cooked, but definitely hard to break the mold), everything else was exceptional. The weirdest thing was the foie gras parfait - which was raw foie gras whipped with egg yolks and paired with tart (rather than sweet) cherries and cherry jam. It was very strange (seriously, foie for a 'dessert' appetizer) but it worked. It came in a big bowl so whatever we didn't have on the bread was added as a topping to everything else. I wish the lamb neck was a bit gamier, but still excellent. Finally, the flounder was spectacular.
Service was excellent. We were immediately seated after confirming our reservation (if you are planning a trip - do make reservations well in advance). The service was atypical - friendly but very relaxed. The menu board is extremely difficult for non-French speakers to read due to the dim lights. Our waiter just told us he recommended 'everything' but was very knowledgeable, answered all our questions and gauged our appetites well as he told us to stop ordering as he was confident we had 'more than enough' food and he was right. He really steered us to configure an optimal meal that satisfied everyone at the table considering some unique dietary restrictions.
Also, the meal was surprisingly affordable. With everything mentioned and two beers, the bill came to $65 each for the four of us - tax and tip included.
Easily the best restaurant I've been to in Canada.