1.Combine chicken stock, wine, soy sauce, sugar, vinegar, sesame oil, spice powder and pepper in a jug.
2.In a bowl, stir a little stock mixture into cornflour, until smooth.
3.Heat oil in a wok on high. Cook chicken in batches for 3-4 minutes, until cooked. Drain on paper towel. Add chilli, ginger and garlic to same wok. Toss for 1 minute, until chilli darkens. Mix in onions.
4.Add stock mixture and stir. Bring to a boil. Slowly add cornflour mixture. Stir until sauce boils and thickness. Simmer for 3 minutes.
5.Return chicken to pan. Toss to heat through. Serve with steamed rice and asian greens.