These guys make an amazing yam burrito. I'm not vegetarian but I get it almost every time because it's so good. Their other burritos are good too and if you're vehemently against something that, goodness no, doesn't have meat then by all means choose them. Otherwise try the amazing yam burrito.
I've been to two of their locations, Kensington and Dundas near the bus terminal, and the food has been great every time. The portions are big; the small burrito is usually enough to fill me up.