Prepare the Chicken: Begin by marinating 400 g chicken thighs (cut into small pieces) in a bowl. Add 2 tablespoons soy sauce, 1/2 tablespoon oyster sauce, 1/2 teaspoon black pepper, and 2 tablespoons corn starch. Mix well, ensuring that each piece is coated. Allow the chicken to marinate for about 10 minutes while you prepare the scallions, chopping them and keeping the white and green parts separate.
Cook the Chicken: In a non-stick pan, heat 4 tablespoons of oil over medium heat. Once the oil is hot, add the marinated chicken to the pan. Sauté the chicken until it’s cooked through and golden brown, which should take about 5-7 minutes. Ensure that there are no pink areas left in the chicken and it reaches an internal temperature of 165°F (75°C).
Add Scallions: After the chicken is cooked, stir in the white parts of the chopped scallions and cook for another 2-3 minutes, until they have softened. If the pieces are larger, covering the pan for a minute can ensure thorough cooking. Add the green parts of the scallions and stir for an additional 10-20 seconds just until they're well incorporated and vibrant.
Serve: Your scallion chicken is ready to be served! Sprinkle with extra pepper or additional scallions if desired. This dish pairs beautifully with steamed rice or noodles, absorbing the delicious sauce.