Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
Chop the broccoli into florets, slice the carrots into rounds, and cut the red bell pepper into bite-sized strips.
Place the chicken breast in the center of the sheet pan and surround it with the prepared vegetables.
Drizzle the olive oil over the chicken and vegetables, then sprinkle evenly with dried oregano, thyme, garlic powder, sea salt, and black pepper.
Toss the vegetables with your hands or tongs to ensure they are well-coated in the oil and spices, and flip the chicken to season both sides.
Spread everything out into a single layer to ensure even roasting and browning.
Roast 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 ensure it remains juicy.