Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Press the extra-firm tofu with a heavy object for 10 minutes to remove excess moisture, then cut into bite-sized cubes.
Peel and cube the sweet potato into small half-inch pieces to ensure even cooking.
In a large bowl, toss the tofu cubes, sweet potato, and broccoli florets with olive oil, sea salt, black pepper, garlic powder, and smoked paprika.
Spread the seasoned mixture in a single layer on the prepared baking sheet and roast for 20-25 minutes until the vegetables are tender and the tofu is golden.
While the vegetables roast, prepare the dressing by whisking together the Greek yogurt, tahini, lemon juice, and nutritional yeast in a small bowl until smooth.
In a serving bowl, combine the cooked quinoa and drained chickpeas.
Add the roasted vegetables and tofu to the bowl, then drizzle with the creamy lemon-tahini dressing and toss gently before serving.