01 - Wrap the tofu block in a clean towel and place a heavy object on top. Press for 10 to 15 minutes to remove excess moisture.
02 - Cut the pressed tofu into bite-sized cubes approximately 0.75 inches.
03 - Whisk together soy sauce, sesame oil, rice vinegar, garlic powder, and onion powder in a bowl. Add tofu cubes and gently toss to coat. Marinate for 10 minutes.
04 - Combine cornstarch, panko breadcrumbs, salt, and black pepper in a shallow bowl.
05 - Thoroughly coat each marinated tofu cube in the cornstarch mixture.
06 - Heat vegetable oil in a large nonstick skillet over medium-high heat.
07 - Arrange tofu cubes in a single layer and fry for 2 to 3 minutes per side until golden and crispy, approximately 10 minutes total, cooking in batches if necessary.
08 - Remove tofu from skillet and drain briefly on paper towels. Serve immediately with preferred dipping sauce.