4265 Keaton Crossing Blvd O'Fallon, MO 63368, United States (636) 300-1123 [email protected] http://www.elaztecastl.com/ When residents of O'Fallon, MO, crave Mexican food, they head to El Azteca Mexican Restaurant. Serving local clients for almost a decade, the Tex-Mex restaurant is known for its delectable selection of Mexican staples. If you want an authentic Mexican dining experience complete with a round of margaritas, El Azteca is the place to be. One glance at the mouth-wateringmenu is enough to know... read full review »