Transfer the tofu to a large container and spray with the cooking spray generously, then add the cornstarch, optional seasoning blend and/or salt/pepper to taste.
salt, black pepper, all-purpose seasoning of choice, ⅓ cup cornstarch, neutral cooking spray
Cover with a lid, then shake vigorously to coat the tofu.
Transfer the coated tofu pieces to the air fryer basket and spray generously with spray oil on all sides, flipping as needed.