Mash together smashed green peppercorn and Faux Soy to make a marinade.
Slice chicken thigh into roughly 3/4" inch chunks. Pieces should be easy to eat. If you want them large, make sure they aren't more than about 1/2" thick.
Marinate chicken pieces in Faux Soy-peppercorn mix under refrigeration for 1 to 10 hours, as schedule allows.
Combine starch (and baking soda if using) in a shallow bowl and mix well. Evenly coat dripping-wet chicken pieces in the starch. The residual marinade should capture the starch and and be powdery white when fully coated.
Place dredged chicken chunks on a rack for 30 minutes. During this time the powdery coating should become moist and turn dark. If dry starch remains, you can gently brush off the dry powder to improve the appearance—but it's not strictly necessary.
Deep fry in small batches in a wok or small saucepan at 350-360°F for about 1 minute. Transfer to a paper towel and immediately sprinkle with flaky salt.