Remove tofu from package, and blot dry with a clean kitchen towel. Use your hands to break the tofu apart into chunks, roughly 1 1/2 inches to 2-inches in size, into a medium-sized bowl with a lid.

Season the tofu with tamari, apple cider vinegar, onion powder, and salt. Gently use your hands to ensure even coverage. Marinate for 5 minutes if time allows.

Sprinkle cornstarch and nutritional yeast over the tofu. Cover the bowl with a lid and shake to evenly coat all pieces. Alternatively, use a freezer bag for shaking.

Place all tofu pieces into the air fryer basket. Air fry at 400 degrees for 11 to 13 minutes, stopping halfway through to spray with oil and shake the basket. Continue cooking, stopping once or twice more to spray again and shake for even browning until golden and crunchy.

Remove from the air fryer and serve immediately with your favorite dipping sauce.