First, preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.
Next, whisk miso paste, soy sauce, maple syrup, sesame oil, garlic, and ginger in a bowl.
Then, toss the tofu cubes with the marinade until evenly coated.
After that, sprinkle cornstarch over the tofu and toss gently.
Meanwhile, spread the tofu in a single layer on the baking sheet.
Next, bake for 25–30 minutes, flipping halfway, until golden and crisp.
Finally, garnish with green onions and sesame seeds before serving.