It's difficult to find authentic Mexican food in this city riddled with mediocre "burrito" restaurants. As an ex-Californian, my love affair for Mexican food knows no bounds.
Good thing my boxing instructor, Rey Morales, suggested Eltrompo in Kensington Market. They serve Mexico City style tacos filled with wonderful things like bistec, chicken tinga, and pork. Guacamole is awesome with just the right combination of tang and creaminess. I'd pass on the fajitas as the vegetable/meat ratio is unbalanced. But I will always order their Tres Leches cake. Staff is friendly and relaxed. You leave with a full and happy belly and with money to spare.