A few weeks back I tried Tacos El Porton... the couple is from the Oaxacan Mixteca & Teloloapan... really nice.. I tried to like it but everything was mediocre. Last night I tried Adobo Grill.... its pretty decent if you know what to order.
This night I tried Ayala's on North Ave... in the same shopping center as Portillo's. I sat at the bar and they served good complimentary Chicharrones with hot sauce... I had the Caldo de Res and it was quite good.... beer is priced well. Most importantly the owner is from Nuevo Leon where Cabrito is the regional specialty and if you can source a 40 day old Kid... he will be more than happy to prepare it for you.
BTW, the locals from Mexico D.F. told me to try out La Mina in Lombard for specialities like Garnachas... I might give it try tomorrow...stay tuned.