01 - Wrap the tofu block in a clean towel and place a heavy object on top. Let it press for 10 to 15 minutes to remove excess moisture.
02 - Cut the pressed tofu into bite-sized cubes approximately 3/4 inch each.
03 - In a bowl, whisk together soy sauce, sesame oil, rice vinegar, garlic powder, and onion powder. Add tofu cubes and gently toss to evenly coat. Let marinate for 10 minutes.
04 - Combine cornstarch, panko breadcrumbs, salt, and black pepper in a shallow bowl.
05 - Thoroughly coat each marinated tofu cube with the cornstarch mixture, ensuring all sides are covered.
06 - Heat vegetable oil in a large nonstick skillet over medium-high heat until shimmering.
07 - Place tofu cubes in a single layer in the skillet, cooking in batches if needed. Fry each side for 2 to 3 minutes until golden and crisp, turning to cook all sides evenly (approximately 10 minutes total).
08 - Remove tofu from skillet and drain briefly on paper towels. Serve hot with a preferred dipping sauce.