Preheat oven to 400°F and line a large baking sheet with parchment paper.
Pat the chicken breast dry and cut into bite-sized cubes.
Rinse and drain the chickpeas, then pat them thoroughly dry with a towel to ensure they get crispy.
Chop the bell pepper, zucchini, and red onion into uniform pieces.
Place the chicken, chickpeas, and vegetables on the baking sheet.
Drizzle with olive oil and sprinkle with garlic powder, oregano, sea salt, and black pepper.
Toss everything together until evenly coated and spread into a single layer.
Roast for 20-25 minutes, tossing halfway through, until the chicken is cooked through and vegetables are tender.
Remove from the oven and drizzle with fresh lemon juice before serving.