Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Peel and cube the sweet potato into 1/2-inch pieces, and chop the broccoli into small bite-sized florets.
Rinse and drain the chickpeas, then pat them very dry with a clean kitchen towel to ensure they crisp up in the oven.
Place the sweet potatoes, broccoli, and chickpeas on the prepared baking sheet; drizzle with olive oil and sprinkle with smoked paprika, garlic powder, sea salt, and black pepper.
Toss everything well to coat and spread in a single layer, then roast for 25-30 minutes until the potatoes are tender and the chickpeas are golden.
While the vegetables roast, combine the dry quinoa with 0.5 cup water in a small pot, bring to a boil, then cover and simmer on low for 15 minutes until fluffy.
In a small bowl, whisk together the Greek yogurt and lemon juice until smooth and creamy to create the dressing.
Divide the cooked quinoa and roasted vegetable mixture into two meal-prep containers or bowls.
Top each bowl with a generous dollop of the lemon-yogurt sauce and a crumble of feta cheese before serving.