01 - In a mixing bowl, whisk together the soy sauce, honey, sesame oil, minced garlic, minced ginger, gochujang, rice vinegar, toasted sesame seeds, black pepper, and sliced green onions until fully combined.
02 - Place the chicken thighs in a large resealable bag or shallow bowl. Pour the marinade over the chicken, making sure every piece is evenly coated. Seal and refrigerate for at least 30 minutes, or up to 6 hours for deeper flavor penetration.
03 - Preheat the oven to 425°F or set a grill to medium-high heat.
04 - Remove the chicken from the marinade and arrange on a parchment-lined baking sheet or place directly on the preheated grill. Bake or grill for 20 to 25 minutes, flipping halfway through, until the internal temperature reaches 165°F and the exterior is caramelized.
05 - Transfer the cooked chicken to a serving platter. Sprinkle with toasted sesame seeds and thinly sliced green onions. Serve immediately while hot.