The question has been asked on the montreal board a couple of years ago and as far as I remember there was no restaurant in town that did that.
A few years ago, the "Insectarium" had bug demo where they presented bugs to eat, it was somewhat succesful, but not enough for a return (I think).
You could contact them to see if they have any leads.
(joke : )
Other than that, you could ask for an "unwashed" salad at a restaurant, you are bound to find a couple of happy critters in there !!! :-)