Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Press the extra-firm tofu to remove excess moisture, then cut into 1/2-inch cubes.
In a large bowl, toss the tofu cubes, chickpeas, and broccoli florets with avocado oil, garlic powder, sea salt, and black pepper until evenly coated.
Spread the mixture in a single layer on the prepared baking sheet and roast for 25-30 minutes, tossing halfway through, until the tofu is golden and the broccoli is tender.
While the vegetables roast, prepare the dressing by whisking together the tahini, lemon juice, nutritional yeast, and 1 tablespoon of warm water until smooth and creamy.
Assemble the bowl by placing the warm cooked quinoa at the base and topping it with the roasted tofu, chickpeas, and broccoli.
Drizzle the lemon-tahini sauce over the entire bowl and serve immediately.