Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Dice the chicken breast, bell pepper, zucchini, and red onion into uniform 1-inch pieces to ensure even cooking.
In a large mixing bowl, combine the chicken, vegetables, and drained chickpeas.
Drizzle with olive oil and lemon juice, then sprinkle with garlic powder, dried oregano, sea salt, and black pepper.
Toss thoroughly until everything is well-coated in the zesty marinade.
Spread the mixture in a single layer on the prepared baking sheet.
Roast for 20 to 25 minutes, or until the chicken is cooked through and the vegetables are tender and slightly caramelized.
Remove from the oven and sprinkle with crumbled feta cheese before serving warm.