Preheat oven to 400°F and line a large baking sheet with parchment paper.
Press the extra firm tofu to remove excess water, then cut it into bite-sized cubes.
In a bowl, toss the tofu, chickpeas, and cubed sweet potato with olive oil, nutritional yeast, garlic powder, sea salt, and black pepper.
Spread the mixture evenly on the baking sheet and roast for 25 minutes until the vegetables are tender and the tofu is golden.
While roasting, whisk together the tahini, lemon juice, and water in a small jar until the dressing is smooth and pourable.
Place the fresh spinach in a serving bowl and top with the warm roasted tofu and vegetable medley.
Sprinkle the hemp hearts over the bowl and drizzle with the creamy tahini dressing before serving.