Wrap the tofu with a kitchen towel to remove excess moisture.
Slice the tofu thinly.
Sprinkle salt, onion powder, and black pepper evenly over the sliced tofu.
Line an air fryer or oven tray with parchment paper.
Place the tofu on the tray and lightly brush with olive oil.
Bake at 180°C (356°F) for 15 to 20 minutes until crispy.
Let cool completely for maximum crispiness.