Make the marinade: Transfer the tamari, rice vinegar, sesame oil, ginger, and garlic powder to a shallow dish, about 8x8 inches. Mix well to combine.
Slice and marinate the tofu: Cut the tofu into about 8 (½-inch-thick)squares or rectangles (2x2 or 2x3 inches).Place the sliced tofu into the dish in a single layer. Set aside for at least 30 minutes, or overnight, flipping them over after 15 minutes.
Preheat the oven to 400ºF.
For coating: Transfer the cornstarch, salt, and pepper to a shallow bowl or rimmed dish. Transfer the aquafaba to a shallow bowl. Transfer the panko to rimmed dish or shallow bowl.
Coat the tofu: Take one piece of the marinated tofu and shake off any excess marinade. Lightly coat it in cornstarch, shaking off any excess. Then dip the piece into the aquafaba, letting any excess drip off. Finally, dip the tofu into the panko. Press gently to coat evenly.
For baking: Transfer the coated tofu to a large nonstick baking sheet. Repeat for the remaining pieces. Optional: lightly spray the pieces with cooking oil. Bake for about 10 minutes, before flipping the pieces over. Bake for 10 minutes more, or until golden brown.
For air frying: Preheat the air fryer to 400ºF. Spray the pieces lightly with cooking oil. Place them in an air fryer basket in a single layer. (You may have to cook them in batches.) Cook for about 10 minutes, or until golden brown.
Prepare the easy dipping sauce (optional). Whisk together tamari, rice vinegar, maple syrup, sriracha, ginger, garlic, and sesame oil in a bowl.
Serve the tofu with easy dipping sauce.
Notes
Oil is optional but a little goes a long way in getting the tofu crispy and golden brown. I recommend spraying the coated tofu lightly with oil.
Make the sauce (if using) right before serving. It is quick and easy to make.
Storage: Refrigerate the remaining Panko Tofu in an airtight container for up to 4 days. Reheat in the oven at 375ºF for about 15 minutes, or until warmed through, flipping the tofu over halfway. Or reheat in the microwave.
For the sauce, refrigerate in an airtight container for up to 4 days.