Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper and lightly coat with nonstick cooking spray.
Press the tofu for 10-15 minutes to remove excess moisture, then cut it into 1-inch cubes.
Place tofu cubes in a bowl. Sprinkle with cornstarch and toss gently to coat evenly.
Spread the tofu on the prepared baking sheet and bake for 25-30 minutes, flipping halfway through until the tofu is golden and crispy.
Meanwhile, toss broccoli florets with a splash of tamari (or soy sauce) and a little nonstick spray. Spread them on another baking pan and roast in the oven for 20 minutes, until edges are slightly crispy.
In a small bowl, whisk together peanut butter, minced garlic, grated ginger, remaining tamari, and a splash of warm water to achieve a smooth, drizzle-able sauce.
Cook quinoa as per package instructions if not pre-cooked. Typically, a 1:2 ratio of quinoa to water simmered until water is absorbed.
Assemble the dish by layering quinoa, roasted broccoli, and baked tofu on a plate. Drizzle the peanut sauce evenly over the top.
Serve warm and enjoy the mix of crispy tofu, flavorful peanut sauce, and hearty quinoa with roasted broccoli.