Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Cut the tempeh into 1/2-inch cubes and drain the chickpeas, patting them thoroughly dry with a clean kitchen towel to ensure they crisp up.
In a large mixing bowl, combine the tempeh cubes, chickpeas, and broccoli florets with the olive oil, sea salt, black pepper, and garlic powder.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the vegetables are not overcrowded.
Roast for 20 to 25 minutes, tossing halfway through, until the tempeh is golden brown and the broccoli edges are slightly charred.
Remove from the oven and immediately sprinkle with nutritional yeast while the ingredients are still hot so it adheres and creates a savory coating.
Transfer the roasted mixture to a bowl, drizzle with fresh lemon juice, and garnish with hemp seeds for added texture and protein.