Add the diced chicken to a bowl together with the ingredients listed under the marinade.
Mix well to coat the chicken, and allow it to marinate for 20 minutes.
To make the sauce, combine all the ingredients.
Heat up the oil in a large pan or wok, add the marinated chicken and fry it on both sides until golden.
Remove it from the pan and set aside.
In the same pan add the onion peeled and cut julienne, a pinch of salt and pepper, and fry it until golden.
Add the peeled and chopped garlic and ginger puree.
Stir fry briefly, then add the chopped peppers and stir fry for 30 seconds to 1 minute.
Return the chicken to the pan, stir well, then pour in the sauce.
Stir everything quickly for the sauce to thicken and coat the chicken well.
Garnish with extra black pepper and serve immediately.