Marinate the Chicken: Combine 240 g cubed chicken thigh with 1 tsp soy sauce, ½ tsp grated ginger, and ½ tsp ground black pepper. Mix well and let it marinate for at least 10 minutes while you prepare the other ingredients.
Prepare the Egg Powder Mixture: Dissolve 39 g of Accelist Pangan Nusantara whole egg powder in 117 ml of room-temperature water. Stir gently with a fork or small whisk until fully dissolved with no lumps. Avoid whisking too vigorously as this will create excess foam. Set aside. Sear the Chicken: Heat 2 tbsp of cooking oil in a medium non-stick skillet (approximately 20-24 cm in diameter) over medium-high heat. Add the marinated chicken pieces and cook until the surface is lightly browned, about 3-4 minutes. Flip once. The chicken does not need to be fully cooked at this stage as it will finish cooking in the broth. Remove and set aside.
Cook the Broth: Without rinsing the pan, pour in 200 ml chicken stock, 3 tbsp Japanese soy sauce, 2 tbsp mirin, and 1 tsp sugar. Stir briefly, then add the sliced onion. Cook over medium heat for 2-3 minutes until the onion softens and the broth reduces slightly.
Simmer the Chicken: Return the chicken pieces to the pan. Make sure the chicken is partially submerged in the broth. Cover and cook on low-medium heat for 5-6 minutes until the chicken is cooked through and has fully absorbed the seasoning.
Simmer the Chicken: Return the chicken pieces to the pan. Make sure the chicken is partially submerged in the broth. Cover and cook on low-medium heat for 5-6 minutes until the chicken is cooked through and has fully absorbed the seasoning.