Press the tofu for at least 15 minutes to remove excess water (dee detailed instructions in the post above)
Slice the tofu into ½ inch fingers.
Set up your breading station: In a bowl, whisk together the water and all-purpose flour until smooth. In a separate bowl, add the panko breadcrumbs, chilli flakes and salt. Mix until combined.
Dip each tofu finger into the batter, making sure to coat it completely. Let the excess drip off.
Dip each battered tofu finger into the panko breadcrumbs, pressing down to coat the tofu completely.
Heat your air fryer to 400°F (200°C) and lightly spray the air fryer basket with cooking spray.
Place the coated tofu fingers in a single layer in the air fryer basket, leaving some space between them. Spray the tops of the tofu fingers with cooking spray.
Air fry the tofu for 6 minutes. Flip them over and cook for another 6 minutes, or until they're golden brown and crispy.
While the tofu cooks, make the dipping sauce by whisking together the ketchup, Worcestershire sauce, soy sauce, and vinegar in a small dish. Season with black pepper, if desired.