Place the sliced beef in a bowl with 2 tablespoons of light soy sauce, 2 tablespoons of Shaoxing cooking wine, and 2 tablespoons of cornflour. Mix well and marinate.
Prepare all your vegetables so they are ready to cook.
Toast the Szechuan peppercorns in a dry pan for 1-2 minutes, or until they become fragrant. Transfer them to a mortar and pestle and pound them slightly, just to break them up a bit.
Make the sauce by combining chilli crisp, fermented bean paste, 1 tablespoon of light soy sauce, black vinegar, and 1 tablespoon of sugar in a bowl. Stir well.
Place a wok over high heat and add the peanut oil. Once the oil is hot, add the marinated beef and stir-fry for 3-4 minutes, or until the beef is browned. Remove the beef from the wok and set aside.
Place the walk back on the heat and add the red capsicums and stir-fry for 1-2 minutes. Then, add the ginger, garlic, and the white part of the spring onions. Stir-fry for a couple of minutes.
Add the toasted Szechuan peppercorns and the beef back into the wok. Stir-fry for 1-2 minutes before adding the sauce. Toss well to combine.
Serve the Szechuan beef garnished with the green part of the spring onions, alongside rice.
