Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Press the firm tofu between paper towels to remove excess moisture, then cut it into 1/2-inch cubes.
Rinse and drain the chickpeas, then pat them completely dry with a clean kitchen towel to ensure they get crispy.
In a large mixing bowl, combine the tofu cubes, dried chickpeas, and cauliflower florets.
Drizzle with olive oil and sprinkle with sea salt, black pepper, garlic powder, and smoked paprika, tossing until everything is evenly coated.
Spread the mixture in a single layer on the prepared baking sheet and roast for 25 to 30 minutes, tossing halfway through, until the cauliflower is tender and the tofu is golden.
Remove from the oven and immediately toss the hot roasted mixture with the nutritional yeast until well coated.
Place the fresh spinach in a serving bowl, top with the roasted vegetable and protein mix, and finish with a bright squeeze of fresh lemon juice.