Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Dice the chicken breast into uniform 1-inch pieces and place them in a large mixing bowl.
Rinse the chickpeas under cold water, drain well, and pat them very dry with a clean kitchen towel to ensure maximum crispiness.
Cut the broccoli into bite-sized florets and the red bell pepper into 1-inch squares, then add them to the bowl with the chicken and chickpeas.
Drizzle the extra virgin olive oil over the mixture and season with sea salt, black pepper, smoked paprika, and garlic powder.
Toss the ingredients thoroughly until everything is well-coated in oil and spices, then spread them out in a single layer on the prepared baking sheet.
Roast in the center of the oven for 20 to 25 minutes, stirring halfway through, until the chicken is golden and the vegetables are tender-crisp.
Remove from the oven and immediately drizzle with fresh lemon juice to lift the flavors before transferring to a serving bowl.