01 -
Season the beef chuck roast evenly with salt and pepper.
02 -
Place the beef, diced onion, minced garlic, sliced carrots, and chopped celery into the slow cooker.
03 -
Pour in the beef broth and red wine if using, then sprinkle the dried thyme over the top.
04 -
Cover the slow cooker and cook on LOW for 8 hours or on HIGH for 4 to 5 hours, until the beef is tender.
05 -
Shred the beef using two forks and serve it alongside the cooked vegetables and juices.