Creating Korean Chicken Skewers is simple if you follow these steps:

1. Prepare the Marinade: In a bowl, whisk together soy sauce, sesame oil, brown sugar, minced garlic, minced ginger, rice vinegar, gochujang (if using), and black pepper.
2. Marinate the Chicken: Place the chicken pieces in a resealable plastic bag or bowl. Pour the marinade over the chicken, ensuring all pieces are well coated. Seal the bag or cover the bowl and refrigerate for 1-2 hours (or overnight for the best flavor).
3. Soak the Skewers: If using wooden skewers, soak them in water for at least 30 minutes to prevent burning on the grill.
4. Preheat the Grill: Preheat your grill to medium-high heat (about 400°F/200°C).
5. Skewer the Chicken: Thread the marinated chicken pieces onto the skewers, leaving a little space between each piece for even cooking.
6. Grill the Skewers: Place the skewers on the grill and cook for about 15-20 minutes, turning occasionally, until the chicken is cooked through and has nice grill marks.
7. Garnish: Once done, remove the skewers from the grill and sprinkle with chopped green onions and sesame seeds.
8. Serve: Transfer the skewers to a serving platter, ready to enjoy!

These steps will guide you in creating these incredible Korean Chicken Skewers effortlessly.