beef short ribs (simmering cut, bone-in or boneless) • harissa paste (adjust to spice level) • garlic, smashed • small onion, chopped • ground cumin • smoked paprika • dried oregano • salt • apple cider vinegar or lime juice (for brightness) • beef broth (or 2 cups water) • corn tortillas • Shredded mozzarella, Oaxaca cheese, or Monterey Jack •