1. Working in batches if necessary, blend all ingredients together (except pork). Dip each slice of pork in the marinade and stack together in a non-reactive container. Cover with plastic wrap and refrigerate for 4 hours or up to overnight.
2. Preheat grill or grill pan; sear each slice of pork on both sides and chop into small pieces.
Serve with Warm Tortillas, Salsa Verde, Cotija Cheese