Preheat oven to 400°F and line a large baking sheet with parchment paper.
Toss the cubed tofu, chickpeas, and diced sweet potatoes with avocado oil, sea salt, black pepper, and garlic powder.
Spread the mixture in a single layer on the baking sheet and roast for 25 minutes, flipping halfway through, until the tofu is golden and sweet potatoes are tender.
While roasting, whisk together the Greek yogurt, tahini, and lemon juice in a small bowl to create a smooth, creamy dressing.
Place the chopped kale in a large bowl and massage it with a pinch of salt until it becomes soft and dark green.
Assemble the bowl by layering the massaged kale, cooked quinoa, and the roasted vegetable-tofu mixture.
Drizzle with the yogurt-tahini dressing and sprinkle with hemp hearts before serving or portioning into meal prep containers.