Chinese
Toss the diced chicken with 1 tbsp soy sauce and 1 tsp cornstarch and set aside to marinate for 10 minutes.
Mix the sauce: remaining soy sauce, black vinegar, sugar, remaining cornstarch, and 2 tbsp water.
Heat oil in a wok over high heat and stir-fry the chicken until golden and cooked through, then remove.
Add the dried chilies and Sichuan peppercorns to the wok and fry briefly until fragrant.
Add garlic, ginger, and bell pepper and stir-fry for about a minute.
Return the chicken, pour in the sauce, and toss until it thickens and coats everything.
Stir in the peanuts and spring onions, cook for 30 seconds more, and serve with steamed rice.