01 - Combine chicken cubes with vegetable oil, garlic powder, soy sauce, black pepper, and salt in a bowl. Toss thoroughly to coat. Marinate for at least 10 minutes, or refrigerate for up to 2 hours for deeper flavor penetration.
02 - Thread marinated chicken pieces onto skewers, leaving small gaps between pieces for even cooking. If using wooden skewers, soak them in water for 20 minutes prior to use to prevent burning during grilling.
03 - Heat a grill or grill pan to medium-high temperature, approximately 375-400°F. Ensure grates are clean and lightly oiled to prevent sticking.
04 - Place chicken skewers on the preheated grill. Cook for 10-15 minutes, turning every 3-4 minutes, until chicken is fully cooked through with an internal temperature of 165°F and develops light char marks on all sides.
05 - While chicken grills, whisk mayonnaise, sweet chili sauce, sriracha, honey, and rice vinegar in a small bowl until smooth and fully combined. Taste and adjust sriracha level for desired spice intensity.
06 - Transfer cooked skewers to a serving platter. Brush generously with Bang Bang sauce or drizzle evenly over the top. Sprinkle with sesame seeds and sliced scallions. Add fresh cilantro leaves if desired. Serve immediately while hot.