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 into 1-inch bite-sized pieces.
Rinse and drain the chickpeas, then pat them very dry with a kitchen towel to ensure they get crispy in the oven.
Place the chicken, chickpeas, broccoli florets, and chopped bell peppers onto the prepared sheet pan.
Drizzle with olive oil and sprinkle with sea salt, black pepper, garlic powder, and smoked paprika.
Toss everything together until evenly coated, then spread into a single layer across the pan.
Roast for 20-25 minutes, or until the chicken is cooked through and the chickpeas are slightly crunchy.
Remove from the oven and immediately toss with fresh lemon juice and lemon zest before serving in a bowl.