Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Rinse the canned chickpeas thoroughly and pat them very dry with a clean kitchen towel; removing moisture is the secret to achieving a crispy texture.
Cut the chicken breast into even 1-inch bite-sized pieces and chop the broccoli and red bell pepper into similar sizes.
In a large mixing bowl, combine the chicken, dried chickpeas, broccoli, and bell pepper.
Drizzle with extra virgin olive oil and sprinkle with garlic powder, smoked paprika, sea salt, and black pepper, tossing until everything is evenly coated.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the ingredients aren't overcrowded so they roast rather than steam.
Roast for 20 to 25 minutes, tossing the ingredients halfway through, until the chicken is cooked through and the chickpeas are golden brown.
Remove from the oven and immediately drizzle with fresh lemon juice to brighten the flavors before serving.