Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Rinse and drain the chickpeas, then pat them completely dry with a clean kitchen towel to ensure they get crispy.
In a large bowl, toss the chickpeas, broccoli florets, and halved Brussels sprouts with the olive oil, sea salt, black pepper, and garlic powder.
Spread the vegetable and chickpea mixture in a single layer on the prepared baking sheet.
Roast for 22 to 25 minutes, tossing halfway through, until the vegetables are tender and the chickpeas are golden and slightly crunchy.
While the vegetables roast, whisk together the non-fat Greek yogurt and lemon juice in a small bowl until smooth and creamy.
Spread the lemon yogurt mixture across the bottom of a wide serving bowl.
Pile the roasted vegetables and chickpeas on top of the yogurt base.
Garnish the bowl with hemp hearts and nutritional yeast for an extra boost of protein and a savory, nutty flavor.