Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Slice the chicken breast into even 1-inch strips to ensure quick and uniform cooking.
Chop the broccoli into bite-sized florets, slice the bell pepper into strips, and coin the zucchini.
Place the chicken and vegetables on the prepared baking sheet.
Drizzle the olive oil over everything, then sprinkle with garlic powder, dried oregano, sea salt, and black pepper.
Toss thoroughly with your hands or tongs until every piece is evenly coated in oil and spices.
Spread the mixture into a single layer, ensuring no overlapping to allow for proper roasting.
Bake for 18-22 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender-crisp.
Remove from the oven and let the chicken rest for 2-3 minutes before serving to keep it juicy.