Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Drain the extra firm tofu and press it between paper towels to remove as much moisture as possible, then cut it into 1-inch cubes.
In a large mixing bowl, combine the tofu cubes, chickpeas, and broccoli florets.
Drizzle with olive oil and sprinkle with garlic powder, smoked paprika, sea salt, and black pepper, tossing well to ensure everything is evenly coated.
Spread the mixture in a single layer on the prepared baking sheet and roast for 25 to 30 minutes, tossing halfway through, until the tofu is golden and the broccoli is slightly charred.
While the vegetables roast, whisk together the tahini and lemon juice in a small bowl, adding a teaspoon of warm water at a time until it reaches a smooth, pourable consistency.
Remove the tray from the oven and immediately toss the hot vegetables with the nutritional yeast.
Transfer the mixture to a serving bowl, sprinkle with hemp seeds, and finish with the tahini drizzle.