Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Rinse and drain the chickpeas, then pat them completely dry with a clean kitchen towel to ensure they roast to a crispy texture.
Dice the chicken breast into uniform 1-inch cubes to ensure even cooking throughout the roasting process.
In a large mixing bowl, combine the chicken pieces, dried chickpeas, broccoli florets, and chopped red bell pepper.
Drizzle the mixture with olive oil and sprinkle evenly with garlic powder, smoked paprika, sea salt, and black pepper.
Toss the ingredients until well-coated, then spread them in a single layer across the prepared baking sheet.
Roast for 20 to 25 minutes, or until the chicken is cooked through and the chickpeas are slightly golden and firm.
Remove from the oven and drizzle fresh lemon juice over the tray to brighten the flavors before serving warm.