Preheat oven to 400°F and line a large baking sheet with parchment paper.
Drain and rinse the chickpeas, then pat them thoroughly dry with a clean kitchen towel to ensure they become crispy during roasting.
In a large mixing bowl, combine the chickpeas, broccoli florets, and sliced bell peppers.
Drizzle the olive oil over the mixture and sprinkle with sea salt, black pepper, garlic powder, and smoked paprika, tossing well to coat every piece.
Spread the vegetables and chickpeas in a single layer on the prepared baking sheet and roast for 20-25 minutes, stirring halfway through, until the broccoli is tender-crisp and chickpeas are golden.
While the vegetables are in the oven, whisk together the Greek yogurt, nutritional yeast, and lemon juice in a small bowl until the sauce is smooth and creamy.
To serve, spread the zesty yogurt sauce across the bottom of a shallow bowl.
Top the sauce with the warm roasted vegetable and chickpea mixture and finish with a sprinkle of hemp hearts.