In a medium bowl, whisk together soy sauce, brown sugar, minced garlic, grated ginger, sesame oil, and black pepper until the brown sugar dissolves completely.

Slice the chicken into thin, even strips and toss it into the marinade, ensuring each piece is well-coated.

Heat a large skillet over medium-high heat and add a drizzle of oil.

Add the marinated chicken in a single layer to the heated skillet and cook for about 5-7 minutes.

Once the chicken is cooked through and caramelized, transfer it to a serving plate and garnish.