Preheat oven to 400°F and line a large baking sheet with parchment paper.
Press the tofu to remove excess moisture, then cut into 1/2-inch cubes.
In a large bowl, toss the tofu, chickpeas, and broccoli with avocado oil, garlic powder, smoked paprika, sea salt, and black pepper.
Spread the mixture in a single layer on the prepared baking sheet.
Roast for 25-30 minutes, tossing halfway through, until the tofu is golden and the chickpeas are slightly crunchy.
In a small bowl, whisk together the tahini, lemon juice, and water until smooth to create the dressing.
Transfer the roasted vegetables and protein to a bowl and top with hemp seeds and nutritional yeast.
Drizzle with the lemon-tahini dressing before serving.