Las Ruinas kicks some major butt. The al pastor is really good. Had a grande al pastor taco with the green tomatillo salsa, fresh lime, cilantro & onion. I also tried the deconstructed chile relleno. It's really not a relleno because it's not "stuffed". It was OK, but I wouldn't order it again. My friends mula looked really good. This place should be on your list for cheap authentic Mexican "Taco stand" food. I'll be back for sure.
Las Ruinas is on the corner of Chester & Green in Pasadena