Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Drain the firm tofu and press it between paper towels to remove excess moisture, then cut into 1/2-inch cubes.
In a large mixing bowl, toss the tofu cubes, chickpeas, and broccoli florets with olive oil, sea salt, black pepper, and garlic powder until evenly coated.
Spread the vegetable and tofu mixture in a single layer on the prepared baking sheet.
Roast for 25 minutes, tossing halfway through, until the tofu is golden and the broccoli edges are slightly charred.
In a small bowl, whisk together the nutritional yeast, tahini, and lemon juice, adding a teaspoon of water at a time until a smooth, pourable consistency is reached.
Place the fresh baby spinach in a large serving bowl and top with the warm roasted tofu, chickpeas, and broccoli.
Drizzle the creamy nutritional yeast dressing over the top and serve immediately.