Cut chicken into small cubes. Mix the chicken pieces with soy sauce, vinegar, baking soda and corn starch. Set aside and marinate for 10-15 mins.
Prepare the stir fry sauce by mixing all the ingredients in a small bowl. Set aside.
Heat the pan into medium high heat. Drizzle ½ Tbsp oil, add the marinated chicken pieces and stir fry for 1-2 mins till the chicken change into nice color. Remove from pan and set aside.
Drizzle ½ tablespoon oil and add the chopped garlic and stir fry for few seconds, then add the ginger and follow by the the dry chillies and stir for few seconds.
Add crushed sichuan peppercorns and chinese five spices and stir for few seconds.
Pour the kung pao sauce mix and chicken stock and stir well for few seconds.
Then add the pepper slices and stir well for few seconds and follow by the chicken pieces and continue stir fry for 1-2 min with medium high heat.
Add the spring onions and roasted peanuts, mix well to combine all ingredients and sauce together.
Delicious Kung Pao Chicken is ready! Serve immediately!
Perfect with hot streamed rice or simple stir fry noodle.