Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Press the extra firm tofu between paper towels for 10 minutes to remove excess moisture, then cut into 1-inch cubes.
In a large mixing bowl, combine the tofu cubes, rinsed chickpeas, broccoli florets, and cauliflower florets.
Drizzle the tamari over the mixture and sprinkle with garlic powder and smoked paprika, tossing well to ensure every piece is evenly coated.
Spread the vegetables and tofu in a single layer on the prepared baking sheet, ensuring they are not overcrowded to allow for proper browning.
Roast for 25 to 30 minutes, tossing halfway through the cooking time, until the tofu is golden and the vegetables are tender with slightly charred edges.
Transfer the roasted mixture to a serving bowl while still hot.
Top the bowl with nutritional yeast, hemp seeds, lemon juice, sea salt, and black pepper before serving.