Add the tofu to the basket of your air fryer and lightly spray with cooking oil. Air fry at 380°F for 18 minutes, or until golden brown and crispy, shaking the basket halfway through cooking.
In a small frying pan, add all of the sauce ingredients and whisk together until combined and the sugar is dissolved. Warm through on medium heat until steaming hot.
Once hot, stir together the cornstarch and water to make a cornstarch slurry, then whisk it into the sauce. Continue stirring until it thickens and becomes glossy and smooth. Turn off the heat. Toss in the air fried tofu and stir to combine in the sauce until fully coated.
Lastly, gently fold most of the green onions, reserve some for topping, and garnish with sesame seeds. Serve over rice or noodles and enjoy!