Cut the chicken breast or chicken thighs into chunks.
Season with salt and coat in cornstarch or potato starch.
Spray oil in the air fryer and add the chicken chunks in a single layer.
Air fry at 400°F for 10-15 minutes (cooking time will vary depending on the size of the chunks and the power of your air fryer).
In a bowl, mix brown sugar, soy sauce, garlic, orange juice, white vinegar, ginger, and red pepper flakes.
Pour the sauce into a pan and simmer. Stir in a cornstarch slurry to thicken the sauce.
Add the cooked chicken chunks to the sauce and stir until fully coated.
Sprinkle with sesame seeds.
Serve with a bowl of rice and enjoy!