Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Dice the chicken breast into bite-sized cubes and ensure the chickpeas are rinsed and patted very dry for maximum crispness.
In a large mixing bowl, combine the chicken, chickpeas, broccoli florets, and chopped red bell pepper.
Drizzle the olive oil over the mixture and sprinkle with garlic powder, smoked paprika, sea salt, and black pepper.
Toss everything thoroughly until the ingredients are evenly coated in the oil and spices.
Spread the mixture in a single layer on the prepared baking sheet, ensuring enough space for the vegetables to roast rather than steam.
Roast in the oven for 20-25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are golden.
Remove from the oven and immediately drizzle with fresh lemon juice while the pan is still hot.
Transfer to a bowl and serve warm, optionally garnishing with fresh parsley or red pepper flakes.