1. Preheat the oven to 230°C (450°F).
2. Marinate the tofu with soy sauce in a bowl for 10 minutes.
3. In another bowl, toss the broccoli with 2 tablespoons of olive oil, salt, and pepper.
4. Place the butternut squash in a baking dish with the remaining 2 tablespoons of olive oil, salt, pepper, and garlic. Bake for 15 minutes. Remove the dish from the oven, stir, and move the squash to one side of the dish.
5. Place the broccoli on the other side of the dish and arrange the tofu in the center, ensuring that each piece is in contact with the dish. Return to the oven and bake until the butternut squash is tender, about 20-25 minutes.
6. Meanwhile, mix tahini, yogurt, lemon juice, water, salt, and sriracha sauce in a small bowl.
7. Serve the tofu with the vegetables, drizzle with tahini sauce, and sprinkle with pumpkin seeds.