I'll be taking a four-day business trip to Mexico City next week. It's my first time to Mexico. Some people are art tourists, others like nightlife: I travel to sample native cuisines prepared as authentically as possible.
I'll be staying at the Four Seasons in DF. I would be very grateful for suggestions where to find great and truly authentic Mexican food -- that is, non-gringo, mom-and-pop fare -- in or at a reasonable distance from the area. I have no dietary limitations, no fear of chili, and will journey around for the good stuff, although my time is limited by work, so I can't go too far.
Thanks in advance for any help.