Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Drain and rinse the chickpeas, then pat them very dry with a clean kitchen towel or paper towels to ensure maximum crispiness.
Cut the chicken breast into 1-inch bite-sized cubes and chop the red bell pepper into similar sized pieces.
In a large mixing bowl, combine the chicken, chickpeas, broccoli florets, and bell peppers.
Drizzle with extra virgin olive oil and sprinkle with sea salt, black pepper, garlic powder, and dried oregano; toss thoroughly to coat.
Spread the mixture in a single, even layer on the prepared baking sheet, making sure not to overcrowd the pan.
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 immediately drizzle with fresh lemon juice before serving warm.