Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Press the extra firm tofu with a heavy object for 10 minutes to remove excess moisture, then cut into 1/2-inch cubes.
Drain and rinse the chickpeas, then pat them completely dry with a clean kitchen towel to ensure they get crispy.
Chop the red bell pepper into bite-sized pieces and prepare the broccoli florets.
In a large bowl, combine the tofu, chickpeas, broccoli, and bell pepper. Drizzle with olive oil and sprinkle with sea salt, black pepper, and garlic powder.
Toss everything until evenly coated and spread in a single layer on the prepared baking sheet.
Roast for 25-30 minutes, tossing halfway through, until the tofu is golden and the vegetables are tender with charred edges.
Remove from the oven and immediately sprinkle with nutritional yeast and hemp hearts while still hot.
Drizzle with fresh lemon juice before serving in a large bowl.