Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Press the extra firm tofu between paper towels to remove excess moisture, then cut into 1/2-inch uniform cubes.
Rinse and drain the chickpeas, then pat them thoroughly dry with a clean kitchen towel to ensure they get crispy.
In a large mixing bowl, toss the tofu cubes, chickpeas, broccoli florets, and sliced bell pepper with olive oil, sea salt, black pepper, and garlic powder.
Spread the mixture in a single layer on the prepared baking sheet, ensuring enough space for air to circulate.
Roast for 25 to 30 minutes, tossing the ingredients halfway through, until the tofu is golden and the vegetables are tender.
Remove from the oven and immediately sprinkle with nutritional yeast and fresh lemon juice while still hot before serving.