01 - In a large mixing 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 ensure even coating. Allow the chicken to rest for at least 10 minutes at room temperature, or refrigerate for up to 2 hours for deeper flavor penetration.
03 - Place a large skillet or grill pan over medium-high heat and allow it to preheat for 2 to 3 minutes until the surface is hot and ready for searing.
04 - Transfer the marinated chicken pieces into the hot skillet in a single layer. Cook for 6 to 8 minutes per side, until the chicken develops a caramelized exterior and reaches an internal temperature of 165°F.
05 - Remove the skillet from heat and transfer the chicken to a serving platter. Sprinkle with toasted sesame seeds and thinly sliced spring onion. Serve immediately alongside steamed white rice or your preferred vegetables.