01 - Preheat oven to 425°F. Line a baking sheet with parchment paper or foil and set a wire rack on top.
02 - Pat chicken wings dry with paper towels. Place in a large bowl.
03 - In a separate bowl, whisk together orange juice, orange zest, soy sauce, honey, brown sugar, rice vinegar, olive oil, garlic, ginger, chili flakes (if using), salt, and pepper.
04 - Pour half the marinade over the wings. Toss to coat. Reserve the other half for glazing.
05 - Arrange wings in a single layer on the prepared rack. Bake for 35-40 minutes, turning once halfway through, until golden and cooked through.
06 - Meanwhile, pour reserved marinade into a small saucepan. Bring to a boil, reduce heat, and simmer for 5 minutes. Stir in cornstarch slurry and cook 1-2 minutes more, until thick and glossy.
07 - Remove wings from oven. Toss in the sticky orange glaze until fully coated.
08 - Arrange wings on a platter. Sprinkle with sesame seeds and green onions.