Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Pat the diced chicken breast and chickpeas dry with a paper towel to ensure they get maximum crispiness in the oven.
In a large bowl, toss the chicken, chickpeas, broccoli, and bell pepper with olive oil, sea salt, black pepper, smoked paprika, and garlic powder.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the ingredients are not overcrowded.
Roast for 20-25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are golden and crunchy.
While the bowl components roast, whisk together the Greek yogurt, lemon juice, and chopped parsley in a small bowl to create a bright dressing.
Divide the roasted mixture into a bowl and finish with a generous drizzle of the creamy lemon-herb sauce.