01 - Preheat oven to 400°F. Line a large sheet pan with parchment paper.
02 - In a large bowl, combine chicken breasts with 2 tablespoons olive oil, parsley, garlic powder, thyme, oregano, salt, and pepper. Coat evenly on all sides.
03 - Place seasoned chicken breasts onto the center of the sheet pan.
04 - Toss broccoli, bell pepper, zucchini, and red onion with 1 tablespoon olive oil and a pinch of salt in a separate bowl.
05 - Spread vegetables around chicken pieces on the pan, ensuring even distribution.
06 - Bake in preheated oven for 25 minutes, or until chicken reaches an internal temperature of 165°F and vegetables are tender.
07 - Rest chicken for 2 minutes, then serve with roasted vegetables arranged on plates.