Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Pat the chicken breast dry with paper towels and cut into uniform 1-inch bite-sized pieces.
Slice the zucchini into half-moons, dice the red bell pepper into 1-inch squares, and cut the red onion into thin wedges.
In a large mixing bowl, whisk together the extra virgin olive oil, minced garlic, dried oregano, sea salt, black pepper, and lemon juice.
Add the chicken pieces, zucchini, bell peppers, red onion, and rinsed chickpeas to the bowl, tossing thoroughly until every piece is coated in the herb oil.
Spread the mixture in a single, even layer on the prepared baking sheet, ensuring the chicken pieces are not crowded to allow for proper browning.
Roast for 20 to 25 minutes, tossing the ingredients halfway through, until the chicken is cooked through and the vegetables are tender with slightly charred edges.