Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Chop the broccoli into bite-sized florets, slice the zucchini into half-moons, and dice the red bell pepper into one-inch pieces.
Place the chicken breast on one side of the sheet pan and arrange the prepared vegetables on the other side in a single layer.
In a small bowl, whisk together the olive oil, sea salt, black pepper, dried oregano, garlic powder, and onion powder.
Drizzle the herb oil mixture over both the chicken and the vegetables, using your hands or a brush to ensure everything is evenly coated.
Roast in the center of the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and slightly caramelized.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy.
Plate the sliced chicken alongside the roasted vegetables and serve immediately.