Combine all of the sauce Ingredients together until smooth and set aside.

Heat a wok up over a high heat and add in some vegetable/cooking oil so it's around 1/2 cm high (enough to shallow fry). Whilst that heats up coat the chicken breast pieces in some cornflour, ensuring it's completely covered.

Once the oil is hot, add in the chicken and fry them until cooked through, golden brown and the outside crispy. You may need to cook them in 2-3 batches. Once cooked lay them out on some kitchen towel to remove excess oil.

Drain off the tainted oil from the wok, and just leave enough to coat the wok base thinly. Add the whites of the spring onions and crushed garlic. Fry for a minute until fragrant then add in the sauce. Cook the sauce for a few seconds until it thickens then add a small dash of water to loosen it up. Give it a good stir. Turn down the heat and bring the sauce to a simmer. Allow the sauce to reduce down by half and thicken.