Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Place the broccoli florets, sliced red bell pepper, and sliced carrots on the baking sheet.
Drizzle the vegetables with half of the olive oil and season with a pinch of sea salt and black pepper, tossing well to coat.
Roast the vegetables in the oven for 18-20 minutes, or until they are tender and show light golden-brown edges.
While the vegetables roast, season both sides of the chicken breast with the garlic powder, dried oregano, and the remaining sea salt and black pepper.
Heat the remaining olive oil in a heavy-bottomed skillet over medium-high heat until shimmering.
Place the chicken in the skillet and sear for 6-7 minutes per side, ensuring the exterior is golden and the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest for 5 minutes to lock in the juices before slicing.
Serve the sliced chicken alongside the warm roasted vegetables for a clean and balanced meal.