Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Drain and rinse the chickpeas, then pat them thoroughly dry with a clean kitchen towel to ensure they crisp up in the oven.
In a large mixing bowl, combine the dried chickpeas and broccoli florets with the olive oil, garlic powder, smoked paprika, sea salt, and black pepper.
Toss until the vegetables and chickpeas are evenly coated, then spread them in a single layer on the prepared baking sheet.
Roast for 20 to 25 minutes, tossing halfway through, until the chickpeas are golden and the broccoli edges are slightly charred.
While the vegetables roast, prepare the dressing by whisking together the Greek yogurt and lemon juice in a small bowl until smooth and pourable.
Place the warm cooked quinoa in the base of a serving bowl and top with the roasted chickpea and broccoli mixture.
Garnish the bowl with hemp hearts and crumbled feta cheese, then finish by drizzling the lemon-yogurt sauce over the top.