Set stovetop to high heat.
Heat the vegetable oil until extremely hot (the oil will shimmer and have currents running through it), then add the dried red pepper flakes, Sichuan peppercorns, sambal, & garlic and cook for 30 seconds, stirring continuously (this step flavors the oil).
Next, add the white portion of the scallions, and stir for 30 seconds.
Push all of the aromatics to one side of the pan and add the chicken, leaving it for approximately 30 seconds, to start a sear. Flip the chicken pieces over and leave for another 30 seconds. After searing on both sides, mix everything together and stir-fry until the chicken is ‘just’ cooked, about 3-4 minutes.
When the chicken is fully cooked, add the already prepared sauce, and the peanuts.
Stir-fry for 30 seconds to heat, while mixing.
Serve over steamed rice, sprinkling the thinly sliced green onion overtop.