01 - In a large mixing bowl, whisk together the gochujang, soy sauce, rice vinegar, honey, minced garlic, grated ginger, sesame oil, and black pepper until smooth and well combined.
02 - Add the chicken pieces to the marinade and toss to coat evenly. Allow to marinate for at least 20 minutes at room temperature, or refrigerate for up to 2 hours for deeper flavor penetration.
03 - Heat a large skillet or non-stick pan over medium-high heat. Add the marinated chicken along with any excess marinade and cook for 6 to 8 minutes per side, until the chicken is fully cooked through and nicely caramelized on the exterior.
04 - Remove the pan from heat and transfer the chicken to a serving plate. Sprinkle with toasted sesame seeds and sliced green onions. Serve immediately with steamed rice or crisp lettuce wraps.