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 to ensure they crisp up in the oven.
Cut the chicken breast into bite-sized 1-inch cubes and chop the bell pepper and zucchini into similar sizes.
In a large mixing bowl, combine the chicken, dried chickpeas, bell peppers, and zucchini.
Drizzle the olive oil over the mixture and sprinkle with sea salt, black pepper, garlic powder, and dried oregano.
Toss everything thoroughly until the chicken and vegetables are evenly coated in oil and spices.
Spread the mixture in a single layer on the prepared baking sheet, making sure not to overcrowd the pan so the vegetables 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 the fresh lemon juice to brighten the flavors.
Serve warm, optionally garnished with fresh parsley if desired.