Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Pat the chicken breast dry with a paper towel and cut into 1-inch bite-sized cubes.
Rinse the chickpeas and dry them thoroughly using a clean kitchen towel to ensure they become crispy during roasting.
Place the chicken cubes, chickpeas, broccoli florets, and sliced red bell pepper onto the prepared baking sheet.
Drizzle the olive oil over the ingredients and sprinkle evenly with smoked paprika, garlic powder, sea salt, and black pepper.
Toss everything together until well-coated and spread into a single layer, ensuring the chicken and chickpeas have space to roast.
Roast for 20 to 25 minutes, tossing the ingredients halfway through, until the chicken is cooked through and the chickpeas are golden and crisp.
Remove from the oven and drizzle with fresh lemon juice before serving in a large bowl.