01 - In a large bowl, combine gochujang, soy sauce, sesame oil, honey, rice vinegar, garlic, ginger, brown sugar, and black pepper. Mix well to create a smooth, homogeneous marinade.
02 - Add chicken pieces to the bowl, tossing thoroughly to coat evenly with the sauce. Cover and marinate for at least 15 minutes, or up to 2 hours in the refrigerator for deeper flavor penetration.
03 - Preheat a large skillet or grill pan over medium-high heat until properly heated through.
04 - Add marinated chicken to the pan in a single layer, shaking off excess marinade. Cook for 5–7 minutes per side, turning occasionally, until chicken is cooked through and develops caramelized edges.
05 - Pour any remaining marinade into the pan, reduce heat to medium, and simmer for 2–3 minutes until the sauce thickens and glazes the chicken evenly.
06 - Transfer glazed chicken to a serving plate. Sprinkle with sliced green onions and sesame seeds. Serve immediately with steamed rice or your choice of sides.