Cut chicken into bite-sized pieces evenly.
Season chicken with salt and pepper thoroughly.
Toss chicken pieces with cornstarch until coated.
Heat oil in large skillet over medium heat.
Cook chicken pieces until golden brown completely.
Remove chicken and set aside temporarily.
Mix honey, soy sauce, and vinegar together.
Add garlic, ginger, and red pepper flakes.
Pour sauce mixture into same skillet carefully.
Simmer sauce until it begins bubbling gently.
Return chicken to skillet and toss well.
Cook until chicken is thoroughly coated sticky.
Garnish with chopped green onions before serving.