Press the tofu thoroughly to remove excess moisture. Wrap the block in clean kitchen towels or paper towels, place a heavy object on top (like a cast iron skillet), and let sit for at least 30 minutes. This ensures your tofu gets crispy, not soggy.
Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper for easy cleanup.
Cut the pressed tofu into 1-inch cubes or triangles, whichever shape you prefer. Uniform size ensures even cooking.
Make the marinade by whisking together the miso paste, maple syrup, soy sauce, rice vinegar, minced garlic, grated ginger, and oil in a medium bowl until smooth. The consistency should be thick but pourable.
Toss the tofu cubes with cornstarch in a separate bowl, ensuring each piece is lightly coated. This creates a crispy exterior that will hold the glaze beautifully.
Gently fold the tofu into the marinade, making sure each piece is well-coated. Let it marinate for at least 15 minutes (or up to 8 hours in the refrigerator for more flavor penetration).
Arrange the tofu pieces on the prepared baking sheet, ensuring they’re not touching each other. This allows air circulation for proper caramelization.
Bake for 15 minutes, then flip each piece and continue baking for another 10-15 minutes until the edges are caramelized and slightly crispy.
Optional: Brush any remaining marinade over the tofu during the last 5 minutes of baking for an extra flavor boost.
Sprinkle with sesame seeds and green onions immediately after removing from the oven. Serve hot for the best texture and flavor experience.