Stir together all the Sauce ingredients in a small jug or bowl and set aside.
Heat up the oil in a frying pan or wok on high heat. Stir fry the garlic and chilli for 10-15 seconds, or until the garlic starts browning lightly.
Then add the chicken and continue stir frying for 2 minutes. Then add the sauce and stir fry for another 2 minutes. Then add the spring onions, stir frying again for 1 minute.
Turn off the heat and then stir through the basil leaves until just wilted. Serve with steamed rice and a fried egg.
Tips:
Keep the temperature of the wok as high as you can. This creates a great smoky flavour and everything will cook more quickly.
In Thailand, this dish is quite spicy. You can increase the spiciness of this recipe by using Birdseye or Thai chillies.