The ingredients: marinated chicken thigh meat, potatoes and carrots cut into diamond chunks, garlic smashed, onion sliced, and curry blocks ready.
For the chicken thighs, remove the skin, bone, and sinew, soak in cold water for about 30 minutes, drain well, and cut into chunks. Add 2 g salt, 1 tbsp Shaoxing wine, 2 tbsp light soy sauce, 1 tbsp oyster sauce, a dash of white pepper, and 1 tbsp cornstarch, toss to combine, then coat with 2 tbsp cooking oil.
Heat the wok, add oil, and over medium heat add the ginger slices and the marinated chicken; resist stirring for 1 minute, then stir-fry until the meat loses its raw color. Add the garlic and onion and stir to combine, then add the carrots and stir, then the potatoes and stir again.
Pour in boiling water until it levels with the vegetables, cover, and simmer over medium heat for 15 minutes, until a chopstick pierces a potato easily. Add the broken-up curry blocks, stir until melted, then lower the heat and simmer 5–8 minutes, stirring constantly to keep the bottom from scorching.
When the sauce is thick and glossy, take the wok off the heat; for a creamier finish stir in milk at the very end without a long boil.
Serve hot—the chicken is tender and silky, the potatoes have drunk up the curry sauce and turned velvety, and the carrots bring their own gentle sweetness.