I work from home a lot, so finding great lunch spots in Mile End is a favourite pastime, and Tachido is definitely on my 'repeat-visits' list.
The veggie tortas are delicious, especially when paired with the daily agua fresca. And it's just as easy to eat in as it is to do take away for an outdoor lunch in summer at some of the nearby parks. A definite win for the neighbourhood, and for my lunch hour.
The daily agua is a treat in and of itself - a personal favourite is the cantaloupe. Visit often so you can try lots of these daily concoctions.