Sear the beef in a hot skillet with olive oil until browned on all sides.

In a slow cooker, combine garlic, onion, taco seasoning, green chiles, tomato paste, and beef broth.

Add the seared beef to the slow cooker, cover, and cook on low for 6-8 hours until the beef is fork-tender.

Shred the beef using two forks and return it to the slow cooker to absorb the juices.

Serve the shredded beef in tacos, burritos, or over rice, and garnish with your favorite toppings.