Follow these detailed steps carefully. The technique is just as important as the ingredients for achieving that signature crunch and perfectly lacquered glaze.

1. Prepare the Oven and Baking Sheet: Begin by preheating your oven to 425°F (220°C). Position a rack in the upper-middle section of the oven. Line a large baking sheet with aluminum foil for easy cleanup. Place an oven-safe wire rack on top of the foil-lined sheet. This setup is critical; the wire rack allows hot air to circulate completely around each wing, rendering the fat and crisping the skin on all sides, preventing a soggy bottom.
2. Dry and Season the Wings: This is the most important step for crispy skin. Place the chicken wings on a tray lined with paper towels. Use more paper towels to pat each wing thoroughly dry. Any excess moisture will steam the chicken skin instead of crisping it. In a large bowl, combine the completely dry wings with the cornstarch, salt, black pepper, and garlic powder. Toss vigorously until every wing is lightly and evenly coated. The cornstarch mixture should look like a very thin, dusty film on the chicken.
3. Arrange for Baking: Carefully arrange the seasoned wings on the prepared wire rack in a single layer. Make sure there is space between each wing. Overcrowding the pan will trap steam and prevent the wings from getting crispy. If necessary, use two baking sheets to ensure proper spacing.
4. First Bake for Crispiness: Place the baking sheet in the preheated oven and bake for 45-50 minutes, flipping the wings halfway through the cooking time. The wings are done with this first bake when they are golden brown, the skin is visibly crispy, and they are cooked through. This initial high-heat bake is designed to render the fat and achieve that perfect crunch.
5. Prepare the Sweet Chili Glaze: While the wings are in their final 10 minutes of baking, prepare the glaze. In a small saucepan over medium heat, combine the sweet chili sauce, soy sauce, rice vinegar, grated ginger, and minced garlic. Whisk to combine and bring the mixture to a gentle simmer. Let it simmer for 2-3 minutes, stirring occasionally, until the sauce has thickened slightly and the flavors have melded together. The raw edge of the garlic and ginger will cook off, creating a smooth, cohesive sauce. Remove from the heat and set aside.
6. Glaze the Wings: Once the wings are golden brown and crispy, carefully remove them from the oven. Place the hot wings into a large, clean bowl. Pour about three-quarters of the warm glaze over the wings. Using tongs, toss the wings gently but thoroughly until each one is beautifully coated in the sticky sauce.
7. Second Bake to Set the Glaze: Return the glazed wings to the wire rack on the baking sheet. Place them back in the 425°F oven for an additional 5-7 minutes. This final, short bake is crucial. It helps the glaze caramelize and “set” onto the wings, making them wonderfully sticky and locking in the flavor without making the crispy skin soggy. Watch them closely during this step to prevent the sugars in the glaze from burning.
8. Serve and Garnish: Remove the wings from the oven. Let them rest for a minute or two. Transfer them to a serving platter. If desired, drizzle with any remaining glaze. For a final touch of elegance and flavor, sprinkle generously with toasted sesame seeds and freshly chopped cilantro or green onions before serving immediately.