Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Dice the chicken breast into 1-inch cubes and chop the broccoli, bell pepper, and zucchini into similarly sized bite-sized pieces.
In a large mixing bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, dried oregano, garlic powder, sea salt, and black pepper.
Add the chicken, chopped vegetables, and drained chickpeas to the bowl, tossing thoroughly until every piece is evenly coated in the lemon-herb marinade.
Spread the mixture in a single, even layer across the prepared baking sheet, ensuring nothing is overcrowded to allow for proper roasting.
Roast in the center of the oven for 20 to 25 minutes, tossing the ingredients halfway through, until the chicken is cooked through and the vegetables are tender and slightly caramelized.