Preheat your oven to 400°F (200°C) 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 uniform 1-inch bite-sized pieces.
Drain and rinse the canned chickpeas, then spread them on a clean kitchen towel and pat thoroughly dry to ensure they get crispy.
In a large mixing bowl, combine the chicken, chickpeas, broccoli florets, and sliced bell peppers.
Drizzle with olive oil and sprinkle with smoked paprika, garlic powder, sea salt, and black pepper, tossing until everything is evenly coated.
Spread the mixture in a single layer on the prepared baking sheet, ensuring enough space for the vegetables to roast rather than steam.
Roast for 18 to 22 minutes, or until the chicken is cooked through and the chickpeas are golden and slightly crunchy.
Remove from the oven and immediately drizzle with fresh lemon juice to brighten the flavors before serving.