Slice the beef shin and blade tendon into desired cube sizes. Rinse under cold running water and soak for 1 hour to remove excess blood and impurities.
After soaking, pat the beef and tendon dry completely.
In a pan, heat a sufficient amount of vegetable oil over medium heat. Add the rock sugar and stir until caramelised to a golden brown.
Add the beef pieces to the pan, stirring quickly to coat them evenly with the caramelised sugar. Once coated, remove the beef and set aside.
Using the same pan (add more oil if necessary), sauté the Doubanjiang and Gochugaru powder. Then, stir in the chopped spring onion, ginger slices, and smashed garlic, cooking until aromatic.
Return the beef to the pan, and add the rice cooking wine, soy sauce, and oyster sauce. Stir well to coat the beef evenly in the sauce mixture.
Transfer the beef mixture to an Instant Pot. Add the tomato wedges, onion halves, and carrot chunks.
Pour in the hot water, then add the star anise, cinnamon sticks, Sichuan peppercorn,bay leaves, and Chinese five-spice powder. Season with white pepper and vegetarian seasoning powder (or MSG alternative).
Set the Instant Pot to ‘Pressure Cook’ on high pressure for 30 minutes.
Once the cooking time is up, carefully release the pressure according to the pot’s instructions.
While the beef is cooking, prepare the noodles according to the package instructions. Optionally,blanch pak choi or other greens in the same pot during the last minute or two of cooking.
To serve, place the cooked noodles in a large bowl, ladle the hot beef broth (*Use a colander to strain the broth to remove the spices and other solids for a clearer soup base)and beef chunks over them. Garnish with chopped spring onion and pickled mustard greens. Drizzle with chilli oil or add fresh chilli if desired. Enjoy!