Cut the firm or extra-firm tofu into thick filets, about 1-inch width. Press the tofu using a clean kitchen towel or tofu press for at least 30 minutes to remove excess moisture.

In a mixing bowl, combine soy sauce, miso paste, minced garlic, and optional lemon zest. Place the pressed tofu filets in the marinade, ensuring each piece is fully coated. Allow to soak for at least 30 minutes.

Heat a non-stick skillet over medium heat and add cooking oil. Wait for the oil to shimmer before adding the tofu.

Place the marinated tofu filets in the hot skillet, cook for 5-7 minutes until golden brown, then flip and fry for another 5-7 minutes.

Remove the tofu from the skillet and serve warm, either as is or alongside your favorite dishes.