The specialty of El Borrego Restaurant is rustic lamb barbacoa, El Borrego Restaurant serves traditional dishes for breakfast and lunch, daily specials catering pickup and meat by the pound. Authentic Mexican Food. Lamb barbacoa Hidalgo Style,Lamb Mixiotes, corn tortillas, Huitlacoche and squash blossom quesadillas and more …all thursday’s green pork pozole-guerrero style.