Prepare the dry rub by combining the salt, pepper, onion, and garlic in a container and shake well. Rub the beef shank with avocado oil on all sides, then season with the rub.
Use a piece of aluminum foil to cover the bone to prevent it from burning, and use the butcher's time to tie around the shank to help it maintain its shape during the cooking process.
Place the beef shank on the smoker for 2 hours at 250 degrees F. After that, spray with a mixture of water, beef stock, Worcestershire, and soy sauce once an hour until you reach an internal temp of about 170 degrees F.
Wrap the beef shank in butcher paper or aluminum foil and continue cooking until you reach an internal temperature of 205 degrees F. Let the beef shank rest for an hour, then remove the shank from the paper, cut off the butcher's twine, and shred the beef. Serve with bbq sauce (optional)
Notes
Serving size about 5oz shredded beefShredded beef shank is great for tacos, burritos, and sandwichesTo reheat heat the beef on the stovetop over low heat with ¼ cup of water until warm.Freeze for up to 4 months in a sealed containerTotal cook time will vary on the quality and size of beef (approx time 6-8 hours)