Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Cut the chicken breast into 1-inch bite-sized cubes and place them in a large mixing bowl.
Add the rinsed and drained chickpeas, broccoli florets, and sliced red bell pepper to the bowl with the chicken.
Drizzle the olive oil over the mixture and sprinkle with ground cumin, smoked paprika, sea salt, and black pepper.
Toss everything together until the chicken and vegetables are evenly coated in the oil and spices.
Spread the mixture in a single layer on the prepared baking sheet, ensuring space between pieces for even roasting.
Roast for 18 to 20 minutes until the chicken is cooked through and the chickpeas have developed a slight crunch.
Remove from the oven, drizzle immediately with fresh lemon juice, and toss once more before serving in a bowl.