Preheat the Blackstone grill over medium high heat (approximately 400 degrees Fahrenheit).
Spread the oil out onto the Blackstone Grill. Place the diced roast and short ribs on the Blackstone Grill and brown each side for 4-5 minutes.
Remove the beef and short ribs and place them in a crock pot.
Add the onions, crushed tomatoes, chiles, chili powder, oregano, cumin, salt, bay leaves and beef broth to the crock pot.
Cover and cook on low for 8-10 hours or on high for 4-5 hours.
Skim the grease from the top of the broth from the crock pot and reserve for frying the tortillas.
Remove the meat and bones. Shred the meat and return it to the crock pot.
Then build the tacos!
Heat the Blackstone Grill over medium high heat (400 degrees Fahrenheit). Dip the tortilla in the reserved grease liquid and place on the grill.
Add meat and cheese to one side of the tortilla. Then fold over to form taco shape and flatten out the tacos.
Continue cooking until the tortilla is crispy and browned, flip and continue cooking on the other side until crisp.
Serve with the fresh limes and enjoy!