Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Press the extra firm tofu for at least 15 minutes to remove excess moisture, then slice into 1/2-inch cubes.
In a large mixing bowl, combine the tofu cubes, chickpeas, and broccoli florets with olive oil, sea salt, black pepper, and garlic powder, tossing until evenly coated.
Spread the tofu and vegetable mixture in a single layer on the prepared baking sheet and roast for 25-30 minutes, flipping halfway through, until the tofu is golden and crispy.
While the vegetables roast, place the kale in a bowl with a small splash of lemon juice and massage the leaves with your hands for 1-2 minutes until they become dark green and tender.
Prepare the dressing by whisking together the tahini, remaining lemon juice, and water in a small jar until the consistency is smooth and pourable.
Assemble the bowl by placing the massaged kale at the base and topping it with the roasted tofu, chickpeas, and broccoli.
Finish the dish by sprinkling with hemp hearts and nutritional yeast, then drizzle the creamy tahini dressing over the entire bowl before serving.