Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Pat the chicken breast dry with a paper towel and cut it into bite-sized cubes.
In a large mixing bowl, combine the chicken, chickpeas, broccoli florets, and chopped bell pepper.
Drizzle the mixture with olive oil and sprinkle with garlic powder, smoked paprika, sea salt, and black pepper, tossing until evenly coated.
Spread the ingredients in a single layer on the prepared baking sheet and roast for 18-20 minutes until the chicken is cooked through and the chickpeas are slightly crisp.
While the bowl base roasts, whisk together the Greek yogurt and lemon juice in a small bowl, adding a teaspoon of water at a time until it reaches a drizzling consistency.
Transfer the roasted chicken and vegetables to a serving bowl, drizzle with the creamy lemon sauce, and garnish with fresh parsley.