Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Drain and rinse the chickpeas, then pat them very dry with a clean kitchen towel to ensure they crisp up in the oven.
In a large mixing bowl, toss the broccoli florets and dried chickpeas with olive oil, nutritional yeast, sea salt, black pepper, and garlic powder until evenly coated.
Spread the vegetables and chickpeas in a single layer on the prepared baking sheet.
Roast for 20 to 25 minutes, tossing halfway through, until the broccoli is tender with charred edges and the chickpeas are golden.
While the vegetables roast, whisk together the Greek yogurt, tahini, and lemon juice in a small bowl until the mixture is smooth and creamy.
Spread the yogurt mixture across the bottom of a serving bowl using the back of a spoon.
Top the yogurt base with the roasted broccoli and chickpeas, then finish by sprinkling the hemp hearts over the top for added texture.