If your peanuts have not been fried, you will need to remove the skin, and then either toast or fry them in a pan with or without oil until golden. Use low heat. Remove from heat and set aside
Cut chicken into 2.5cm (1”) cubes and place in a mixing bowl the size of my chicken is relatively larger than what is typical. I do this because I am not deep frying my chicken beforehand and so the chicken needs to cook longer in the wok. Plus, I’m a bit slower than restaurant chefs so larger pieces will make it less likely for me to overcook the chicken. You can cut them smaller if you like
Add 1 tsp light soy sauce, ½ tsp sugar, ½ tsp salt, 1 ½ tsp cornstarch and 60 ml water to the diced chicken Adding water to meat is a technique called 打水 (dá shǔi) or “hit water” (hitting the meat with water). This will make your meat moist and tender. I generally use 10:1 meat to water ratio
Mix all the ingredients with the chicken until all the water has been absorbed. Let sit for 5 minutes I find it easiest to use your hands to mix the ingredients. Water absorption is better when you squeeze the meat slightly with your hands while you stir in one direction and mix in the marinade.
Give the chicken a stir and add 1 tsp oil to the chicken, mix well and set aside This step is critical to seal the water with the meat
Wash the Chinese leeks, cut them into 4cm (1.5”) pieces and set aside
Prepare chopped garlic and measure dried chilies (approx. 1 big handful) Dried chilies are not very spicy. If you want to add more heat, you can chop up a few fresh Thai chilies. You can also add whole Sichuan peppercorn along with the dry chilies to add more heat!
Prepare sauce by combining 1 tbsp light soy sauce, 1 tsp dark soy sauce, ½ tsp Sichuan peppercorn powder, 1 tbsp sugar, 1 tsp cornstarch, 1 tbsp Chinese black vinegar and 3 tbsp water