Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Drain the extra firm tofu and press it firmly between paper towels to remove excess moisture, then cut into 1-inch cubes.
Peel and dice the sweet potato into 1-inch cubes and place them on the baking sheet along with the tofu cubes.
Drizzle the tofu and sweet potatoes with olive oil and sprinkle with garlic powder, smoked paprika, sea salt, and black pepper; toss to coat evenly.
Roast in the oven for 25-30 minutes, flipping halfway through, until the sweet potatoes are tender and the tofu is golden and crisp.
While roasting, place the chopped kale in a large bowl with a teaspoon of lemon juice and massage with your hands for 2 minutes until the leaves are dark green and tender.
Prepare the dressing by whisking together the tahini, nutritional yeast, remaining lemon juice, and 1-2 tablespoons of warm water until a smooth, pourable consistency is reached.
Assemble the bowl by placing the cooked quinoa and massaged kale at the base, then top with the roasted sweet potatoes, crispy tofu, and chickpeas.
Drizzle the nutritional yeast tahini sauce over the entire bowl and garnish with hemp hearts before serving.