Cut the chilies in half and remove the seeds. Soak them in water for 15 minutes. Drain and set aside.
Cut the chicken into small cubes. Mix the chicken cubes with the marinade and let marinate for 20 minutes.
Heat oil in a wok or pan. Add the chicken cubes and fry until they are lightly golden. Set aside for 5 minutes.
Reheat the oil and fry the chicken again for 1 minute or until fully golden. Set aside.
In a clean wok, add a little oil and stir-fry the chilies over medium-low heat until they turn dark red.
Add the Sichuan peppercorns and continue stir-frying.
Add a little oil and stir-fry the ginger, white part of the green onion and the garlic until fragrant.
Add the chicken, light soy sauce, Shaoxing wine, sesame seeds, sugar, salt, and the green parts of the spring onions. Toss well and serve.
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Notes
Adjust the amount of chilies: Better too few than too many. If you know your tolerance for heat is questionable, make the recipe first with a small amount of chilies and increase little by little each time you cook it. It would be a shame to waste such a delicious dishWait until the oil is properly hot: This is essential to get nice little crunchy pieces of chicken. Therefore, make sure the oil is hot before frying, and if you have a lot of chicken, ideally fry it in two batches