Whisk together soy sauce through green onions for marinade.
Place cubed tofu in a container and add marinade. Shake to distribute marinade. Cover and allow to marinate for at least 1 hour - 24 hours, giving the container a shake or flip it every so often to distribute marinade.
Drain tofu and reserve marinade for use for dipping sauce if desired.
Air fry tofu at 400℉ for 15 minutes. Shaking basket halfway through cook time.
While tofu is in air fryer, heat marinade in small saucepan over medium heat, simmer for 2-3 minute and remove from heat.
Remove tofu from air fryer.
Serve with dipping sauce or by itself.
Enjoy!
Notes
*If you have smaller cubed tofu, check on it after 12 minutes and test for crispness. Smaller cubes will crisp quicker and will harden and possibly burn if let in too long.