Michoacanissimo
Renowned for birria, this unfussy restaurant popular with families and locals serves a few kinds of the spicy stew popular in western Mexico states like Michoacán, including surtida (goat and a mix of other meaty bits like ribs, tongue, skin, and such) and the less adventurous but still robustly flavorful maciza (with pork). Expect a crowd—and maybe a wait—on weekends, when there's also sometimes mariachi music. It's on the city's south side, about 1 mile from UNAM (it's a short Uber ride from Universidad metro).