Take the chicken in big bowl. Add soy sauce, sweet soy sauce, Chinese cooking wine and garlic powder to it. Coat the chicken properly with it and set aside for 10 - 15 mins.
Take a pan and toast the Sichuan peppercorns over medium heat till they release a citrusy fragrance. Then transfer them to the Mortar to cool.
Once cooled add the black peppercorns to it and grind it to a fine powder. Take it out in a small bowl, mix the sea salt in it and keep it aside. You will not need all of it.
Take the marinated chicken out on a paper towel to remove some of moisture. This will avoid burning of marinade while grilling. Let it rest for few mins.
Now heat a non stick pan or a cast iron pan over medium heat. Drizzle some oil on the pan. Place the chicken on the pan and let it cook.
To get even cooking and browning you can put a parchment paper on top of the chicken and place another pan on it. This will press the chicken down. Cook it on medium low heat.
Once the chicken is perfectly cooked or browned from one side flip it over and following the same process to cook the other side.
Take the cooked chicken on a plate and sprinkle some of the ground pepper mix on it. Season it as per your taste and serve it with some salad and lemon.
Notes
Its best to use thigh piece of chicken.
Using the chicken with skin on will give crisp texture and even browning.
If you do not have Sichuan peppers you can just use black peppers
do not cover the pan with tight lid and cook, the moisture needs to evaporate to get perfect texture.
If there is a splatter while cooking you can cover the chicken with parchment paper. This will stop the splatter as well as let the moisture evaporate.
If you do not want to use cooking wine you can use chicken stock. But the flavor will be different.
Keyword chicken, chinese cooking wine, pan grilled chicken, salt and pepper chicken, sichuan pepper, soy chicken