That's right, kids, free! OK, mostly free--it's really buy one get one free. We used to hit Johnny Rockets on occasion when we lived in Ohio to make it seem like we were "normal" people who could eat out. There is not one near where I am now, but for my Toronto area readers (um, are there are readers from Toronto?), there is a JR in the Square One mall, as well as one in that disgustingly huge Vaughan Mills mall near the IKEA off Highway 7. Check here for JR locations, and here for the coupon (good for all of May).
UPDATE: Johnny Rockets emailed me back stating that the burger they serve is indeed Boca's vegan burger.