Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Press the extra firm tofu for at least 15 minutes to remove excess moisture, then cut into 1-inch cubes.
On the prepared baking sheet, toss the tofu cubes, broccoli florets, and sliced carrot with olive oil, sea salt, black pepper, and garlic powder.
Roast in the oven for 20 to 25 minutes, flipping the tofu halfway through, until the tofu is golden and the vegetables are tender.
While the vegetables roast, prepare the dressing by whisking together the tahini, lemon juice, nutritional yeast, and 1 tablespoon of warm water in a small bowl until smooth.
Assemble the bowl by placing the warm cooked brown lentils and cooked quinoa at the base.
Top with the roasted tofu and vegetables, then finish by drizzling the creamy tahini dressing over the entire bowl.