In a bowl, add chicken, 1 tsp cornstarch and 2 tsp soy sauce.
Stir to coat and set aside to marinate for 15 minutes.
| Use chicken breast or thigh as a substitute
Heat a wok over high heat.
Add the oil, swirling to coat the sides. Add 3 cloves of thinly sliced garlic and 2 thinly shallots and stir-fry until fragrant, about 10 seconds.
Add the marinated chicken and cook for about 1 minute.
Add red chillies and long beans and cook until tender crisp for about 30 seconds.
Add soy sauce, chicken stock, chinese black vinegar, 1 tbsp fish sauce and 1 tbsp palm sugar.
Bring to a boil, stirring until sauce thickens, for about 1 minute. Toss in the basil and remove from heat.