Yelp pointed me to El Sombrero after leaving a client meeting in the commercial 401/Hurontario neighbourhood. As expected, I was not led astray.
I had a hard time choosing between the traditional options, but finally decided on enchiladas. Served with rice and beans it's a heart meal for lunch. I managed to eat all three delicious chicken enchiladas, but couldn't get through most of the sides.
Note that silverware is at the cash. I was left looking around like a goof until they were pointed out right in front of me.
If you're ever in the area this is a great, timeless hole-in-the-wall.