Dice chicken into bite-size cubes. Add salt, turmeric powder, black pepper powder, sweet soy sauce, and light soy sauce. Sprinkle seasoned chicken with whole wheat flour and corn flour and mix.
Heat up enough oil and fry the chicken until browned. Set aside.
Prepare sauce by combining corn flour, oyster sauce, anchovy powder, water, and sweet soy sauce in a bowl. Stir until smooth.
Heat up some oil and stir in shallots, garlic, and ginger. Add dried chilies and stir-fry for 2–3 minutes. Add white parts of the spring onion, black pepper powder, and fried chicken.
Stir in the capsicum, sauce, additional water, green parts of the spring onion, and salt.
Serve with rice and fried egg.
Tips
For better taste, use young ginger.
If you prefer more sauce, add more water.
Niigata Japanese Anchovy Powder adds better umami.