Season the beef shanks with all purpose seasoning
Set up your smoker to 275–300°F
Smoke the shanks until they reach 170°F internal temperature
Add the shanks to a pot or deep pan with tomatoes, onions, garlic, oregano, salt, cinnamon and beef stock
Cover and place back on the smoker until they reach 205°F and are probe tender
Remove from the smoker, take out the meat and shred it
Strain the braising liquid to make the consommé
Heat a cast iron pan or griddle and add a little oil
Dip tortillas in the consommé, making sure to coat them with the fat
Place tortillas on the pan and add the birria and cheese
Once the cheese starts to melt, fold the tacos and fry both sides
Serve with onions, cilantro and a cup of consommé