Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Press the extra firm tofu between paper towels to remove as much moisture as possible, then cut it into 1/2-inch cubes.
In a large mixing bowl, combine the tofu cubes, chickpeas, broccoli florets, and chopped red bell pepper.
Drizzle the mixture with olive oil and sprinkle with garlic powder, smoked paprika, sea salt, and black pepper, tossing until everything is evenly coated.
Spread the vegetables and tofu in a single layer on the prepared baking sheet and roast for 20 to 25 minutes, tossing halfway through, until the tofu is golden and the broccoli edges are charred.
While the vegetables roast, whisk together the tahini, nutritional yeast, and lemon juice in a small bowl, adding a tablespoon of warm water at a time until a smooth, pourable consistency is reached.
Place the cooked quinoa in the bottom of a serving bowl, top with the roasted tofu and vegetable mixture, and finish by drizzling the creamy tahini sauce over the top.