Honey Garlic Chicken

8 chicken thighs - (skinless and boneless)
Q 2 tbsp cornflour - (cornstarch)
½ tsp salt
½ tsp pepper
2 tbsp vegetable oil
1 tbsp unsalted butter
4 cloves minced garlic
⅓ cup (110g) honey
⅓ cup (80ml) chicken stock
1 tbsp rice vinegar
1 tbsp light soy sauce
To Serve:
1 tbsp finely chopped fresh parsley
½ tsp chilli flakes
boiled rice