01 - In a large bowl, whisk together gochujang, soy sauce, honey, rice vinegar, sesame oil, minced garlic, and grated ginger until smooth and well combined.
02 - Add the chicken pieces to the marinade and toss thoroughly to coat evenly. Let sit for at least 10 minutes at room temperature, or refrigerate up to 2 hours for deeper flavor penetration.
03 - Preheat a large skillet or grill pan over medium-high heat until a drop of water sizzles on contact.
04 - Add the marinated chicken pieces to the hot skillet in a single layer. Cook for 6 to 8 minutes per side until the chicken is cooked through and develops a caramelized, golden-brown exterior.
05 - Remove from heat and transfer to a serving platter. Sprinkle generously with toasted sesame seeds and sliced spring onion. Serve hot alongside steamed rice or vegetables.