Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Press the firm tofu to remove excess moisture, then cut into 1/2-inch cubes.
Rinse and drain the chickpeas, patting them very dry with a clean kitchen towel.
In a large mixing bowl, combine the tofu, chickpeas, broccoli florets, and sliced bell peppers.
Drizzle with olive oil and sprinkle with sea salt, black pepper, garlic powder, and smoked paprika, tossing well to coat evenly.
Spread the mixture in a single layer on the prepared baking sheet.
Roast for 25 to 30 minutes, tossing the ingredients halfway through, until the tofu is golden and the chickpeas are slightly crunchy.
Remove from the oven and immediately sprinkle with nutritional yeast and fresh lemon juice before serving in a large bowl.