01 - Spread the chopped onion and minced garlic evenly across the bottom of the slow cooker.
02 - Nestle the beef chuck pieces on top of the onion and garlic layer.
03 - In a small mixing bowl, combine the chopped chipotle peppers, lime juice, ground cumin, dried oregano, smoked paprika, salt, black pepper, apple cider vinegar, and beef broth. Whisk until well blended.
04 - Pour the seasoning sauce evenly over the beef pieces. Tuck the bay leaves into the liquid around the meat.
05 - Cover the slow cooker and cook on the low setting for 8 hours, or until the beef is fall-apart tender and shreds effortlessly with a fork.
06 - Discard the bay leaves. Using two forks, shred the beef directly in the slow cooker, stirring thoroughly to absorb all the cooking juices.
07 - Serve hot with warm tortillas, over steamed rice, or in burrito bowls. Garnish with chopped cilantro, diced onions, lime wedges, and pickled red onions as desired.