About 4 quarts chicken stock
About 2 3/4 lbs free-range chicken
1 3/4- inch piece fresh ginger , unpeeled
1 fresh red chili
3 dried red chilis
2 tsp Shaoxing wine
2 Tbsp clear rice vinegar
1/2 tsp whole Sichuan peppercorns
Salt to taste
3/4 tsp corn starch mixed with 2 tsp cold water
1 tsp sesame oil
4 Tbsp lard or peanut oil for cooking
Bring the stock to the boil in a large saucepan over a high flame. Add the chicken and return the liquid to the boil, skimming the surface, as necessary. Crush half the ginger and one scallion with the flat side of a cleaver or a heavy object, then add to the pan with the chicken. Reduce the heat and poach the chicken for 10 minutes. Remove the chicken from the cooking liquid and allow it to cool; reserve the cooking liquid. The chicken should be about three-quarters cooked. There will still be some blood, don’t worry.
when the chicken is cool enough to handle, remove the flesh from the carcass and cut as far as possible into bite-size strips, along the grain of the meat. I never discard the skin. (the bones and scrappy pieces of meat can be returned to the cooking liquid and make into stock).
Cut the fresh chili in half lengthwise and discard the seeds and pithy part, then cut into very fine slivers about 1 1/2 inches long. Peel the remaining ginger and cut into slices and then slivers similar to the chili. Cut the green parts of the remaining 2 scallions into slivers of a similar length; set aside.
Heat the wok over a high flame until smoke rises, then add the lard or peanut oil and swirl around. When the oil is warming up but before it is smoking hot, add the fresh chiles, and ginger, along with the dried chiles and Sichuan pepper and stir-fry until fragrant, taking care that the seasonings do not take color or burn.
Add the chicken and continue to stir-fry. Splash the Shaoxing wine around the edges of the chicken. Add the vinegar and salt to taste. Add up to 1/2 cup of the chicken poaching liquid, bring to a boil and then turn the heat down a little and simmer briefly to allow the flavors to penetrate the chicken, spooning the liquid over.
Add the corn starch mixture to the liquid and stir as the sauce thickens. Throw in the scallion greens and stir a few times. Remove from the heat and stir in the sesame oil. Serve.