Preheat oven to 400°F 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.
Arrange the tofu cubes, canned chickpeas, and broccoli florets on the prepared baking sheet.
Drizzle with extra virgin olive oil and season evenly with sea salt, black pepper, and garlic powder.
Roast for 25 to 30 minutes, tossing halfway through, until the tofu is golden and the chickpeas are crispy.
In a small bowl, whisk together the nutritional yeast, lemon juice, water, and Dijon mustard to create a creamy dressing.
Divide the roasted mixture into bowls, drizzle with the zesty dressing, and garnish with hemp hearts.