Place beef brisket in crockpot with the fat side up. Add in the chopped onion, chile, minced garlic, salt, cumin, oregano, cilantro leaves, and bay leaves.
Pour in the beef broth. Cook on LOW for 8-10 hours until meat is fully cooked and easily shredded.
Serve the meat inside of burritos, tacos, or enchiladas. Or enjoy low carb with some grilled vegetables.