From: Fuchsia Dunlop “Every Grain of Rice”
Unfold the chicken thighs and lay them, skin side down on a chopping board. Use a sharp knife to make a few shallow criss-cross cuts into the meat to help flavours penetrate. Then cut each thigh into 3-4cm slices, an uneven 1.5cm or so in thickness. Place the slices in a bowl.
For the marinade, add the soy sauces and egg yolk to the chicken and mix well. Then stir in the potato flour and lastly the oil. Set aside while you prepare the other ingredients.
Combine the sauce ingredients in a small bowl.
Use a pair of scissors to snip the chillies into 2cm sections, discarding seeds as far as possible.
Heat a wok over a high flame. Pour in the deep-frying oil and heat to 180-200°C. Add the chicken and fry until crisp and golden. If you are deep-frying in a wok with a relatively small volume of oil, fry the chicken in a couple of batches. Remove the chicken with a slotted spoon and set aside. Pour the oil into a heatproof container and clean the wok if necessary.
Return the wok to a high flame. Add 2-3 tbsp cooking oil and the chillies and stir-fry briefly until they are fragrant and just changing colour (do not burn them). Toss in the ginger and garlic and stir-fry for a few seconds until fragrant. Pour in the sauce and stir as it thickens. Return the chicken to the wok and stir vigorously to coat the pieces in sauce. Stir in the sesame oil, then serve, with a scattering of spring onion greens if desired.
