Roughly chop the onion and pepper. Finely chop the garlic. Slice the chicken. Cut the chilli in half, discard the seeds and chop.
Heat the oil in a large deep frying pan or wok, and add the garlic, onion, chopped chilli, pepper, chicken and ground ginger. Fry for about 5 minutes at a high heat.
Add the remaining ingredients to the pan, and continue cooking until most of the liquid has evaporated, and the chicken is cooked through (this should take 10 - 15 minutes).Serve with Chinese Rice or noodles.