Preheat your grill or smoker to 250 degrees and set up for indirect heat.
Season the beef short ribs with the BBQ rub and place on the smoker in a cast iron skillet. Smoke the beef short ribs for about 1 hour or until they reach an internal temperature of 165 degrees.
Add about 1 cup of beef broth to the pan and continue the cook the beef short ribs until they are fork tender and shred easily with a fork. Typically about another 1-2 hours.
Combine the sour cream, wasabi powder, lemon juice, and sugar in a small bowl and stir to combine. If desired add to a squeeze bottle for easier serving.
Place the wonton chips on a plate or serving platter. Top with the Asian slaw and then the shredded smoked beef short rib. Top with any additional toppings like tomato, jalapenos, or green onion. Drizzle with the wasabi crema and Sriracha.