To Prep
In a bowl, add the rice vinegar, soy sauce, hoisin sauce, water, sugar and 1 tsp cornstarch and mix well. Set aside this sauce mixture for later.
Add your chicken to the 1 tbsp cornstarch and mix. Make sure the pieces of chicken are covered evenly with cornstarch.
To Cook
Heat up some oil in a pan on medium high heat. When the oil is hot enough, add the chicken to the pan and fry until golden brown and crispy.
Remove the chicken from the pan and add the chilli flakes, ginger, and garlic.
Stir fry until fragrant then add the chicken back to the pan and toss to mix.
Then add the sauce mixture to the pan and mix well. Make sure all the chicken is coated with the sauce.
Cook while stirring for about a minute, until the sauce has thickened.
Plate the dish and garnish with sesame seeds. Serve with cooked white rice.