First, marinade the thighs with soy sauce and Shaoxing wine (60 ml/ 2 fl oz). Next, add rice vinegar (2 tbsp), and season with salt (1 tsp) and pepper (1/2 tsp). Leave to marinade up to 2 hours.
Then, chop garlic (2 cloves), chilli (2) and ginger (2 cm/ 0.8 in).
Add olive oil (2 tbsp) to a hot pan. Put garlic and chilli mixture into the pan. Cook until softened.
Add Sichuan peppercorns (2 tsp) and orange zest (2 tsp).
Next add the marinated chicken thighs along with a marinade.
Then, throw a pinch of sugar (1 tsp) and fry the chicken until it is lovely and brown and the sauce is deliciously thick.
Finish with chopped spring onions (2). Drizzle a bit a soy sauce (2 tsp) and a few drops of sesame seed oil (2 tsp).