Adjust oven rack to center position and preheat oven to 375 degrees F . Press tofu firmly between paper towels to remove excess moisture. Cut into 1 1/2–inch cubes and set aside. In a medium bowl, whisk together miso paste, 2 tablespoons lemon juice, lemon zest, and 1 tablespoon oil. Season generously with salt and pepper. Add tofu and toss to coat. Spread tofu evenly over a foil-lined rimmed baking sheet. Place in oven and bake until golden brown, about 20 minutes. Sauce may darken a little against the foil; this is fine. Set tofu aside.
