Apparently, poutine contains fish

Mike Beltzner, who’s formerly from Toronto, a resident of the other, lesser bay area, and now a product manager at Pinterest, posted a photo of the Canada Day-themed menu at the office:

My first thought: poutine contains fish?

It turns out that the source of the fish is the gravy. Worcestershire sauce is often an ingredient, and that stuff is basically anchovies in brine.