01 - In a large bowl, combine soy sauce, sesame oil, rice vinegar, minced garlic, grated ginger, and black pepper. Add the chicken pieces and toss thoroughly to coat evenly. Marinate for at least 15 minutes or up to 2 hours in the refrigerator for deeper flavor.
02 - If using bamboo skewers, submerge them in water for at least 20 minutes to prevent burning during grilling.
03 - In a small bowl, whisk together mayonnaise, sweet chili sauce, Sriracha, honey, and lime juice until smooth and well combined. Set aside.
04 - Thread the marinated chicken pieces evenly onto the skewers, leaving a small gap between pieces for even cooking.
05 - Preheat a grill or grill pan over medium-high heat. Grill the skewers for 6 to 8 minutes per side until the chicken is cooked through and nicely charred with an internal temperature of 165°F.
06 - Transfer the skewers to a serving platter. Drizzle generously with Bang Bang sauce and sprinkle with sesame seeds and sliced spring onions. Serve immediately with extra sauce on the side.