01 -
Toss sliced chicken with cornstarch, salt, and pepper in a bowl. Allow to marinate for 10 minutes.
02 -
Heat 1 tablespoon oil in a skillet over medium-high heat. Add chicken in a single layer and cook for 2-3 minutes per side until golden and cooked through. Remove from pan and set aside.
03 -
Add remaining oil to the same skillet. Sauté onion for 2-3 minutes until translucent, then add mushrooms and cook for 3-4 minutes until tender and lightly browned.
04 -
In a small bowl, combine soy sauce, oyster sauce (if using), black pepper, sugar, and chicken broth. Pour into skillet with vegetables and stir to combine.
05 -
Return cooked chicken to skillet. Add cornstarch slurry and stir continuously until sauce thickens, about 1 minute.
06 -
Serve hot with steamed rice or noodles.