Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Cut the chicken breast into 1-inch bite-sized pieces and slice the red bell pepper into thin strips.
Rinse and drain the chickpeas, then pat them completely dry with a paper towel to ensure they get crispy.
In a large bowl, toss the chicken, chickpeas, broccoli florets, and bell peppers with olive oil, sea salt, black pepper, garlic powder, and smoked paprika until evenly coated.
Spread the mixture in a single layer on the prepared baking sheet, ensuring nothing is overcrowded.
Roast for 18 to 20 minutes, or until the chicken is cooked through and the chickpeas are slightly golden.
While roasting, whisk together the Greek yogurt, lemon juice, and lemon zest in a small bowl to create the zesty drizzle.
Transfer the roasted chicken and vegetables to a bowl and finish by drizzling the lemon-yogurt sauce over the top.