Cut 300 g chicken breast into large bitesize pieces and place them in a bowl. Sprinkle with 1 pinch salt, 1 pinch ground white pepper and ½ tbsp sake. Mix thoroughly.
Add 1 egg white to the bowl and save the yolk(s) for later. Mix until the chicken is fully covered.
Add 1 tbsp potato starch (katakuriko) and mix again until the chicken pieces are coated.
Pour ½ tbsp cooking oil into the bowl and mix once more, then rest for 5-10 minutes while you prepare the rest of the ingredients.
Take a small bowl and mix all of the sauce ingredients together. (3 tbsp water, ½ tbsp light brown sugar, 2 tbsp tomato ketchup, 1 tbsp sake, 1 tsp Chinese-style chicken bouillon powder, ½ tsp dashi granules) Set by the stove for later.
Heat a large pan or wok over medium heat and add 1 tsp cooking oil. Once hot, add the chicken and fry until browned on both sides. Once there is no more pink, transfer the chicken to a plate and set by the stove for later.
In the same pan, add a little more oil along with ½ Japanese leek (naganegi), 3 garlic cloves, and 1 tbsp ginger root (all finely diced). Fry until fragrant.
Add ½ tbsp chili bean sauce (toban djan) and mix well. Heat for 1 minute to release its flavor.
Add the prepared sauce from earlier and heat until gently bubbling.
Add the chicken back to the pan along with 1 tsp lemon juice, 1 tsp toasted sesame oil, ½ tbsp chili oil and 2 tbsp green peas.
Cook until the ingredients are warmed through and the sauce is thick and glossy, then remove the pan from the heat.
Take a new pan and heat on low. Melt ½ tbsp butter. Crack 1 egg into a bowl and add 1 egg yolk (leftover from earlier). Whisk and pour it into the pan. Mix continuously until cooked to your liking and season with salt and pepper to taste.
Serve the scrambled egg and tori chili on the same plate and sprinkle with finely chopped green onions to garnish. Best served with white rice. Enjoy!