Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Chop the broccoli, red bell pepper, and carrot into uniform bite-sized pieces to ensure even roasting.
Place the vegetables on the baking sheet and toss with half of the olive oil, half of the sea salt, and half of the dried oregano.
Roast the vegetables in the oven for 20 to 25 minutes until they are tender and show slight caramelized edges.
While the vegetables roast, season the chicken breast on both sides with the remaining sea salt, black pepper, garlic powder, and oregano.
Heat the remaining olive oil in a stainless steel or cast-iron skillet over medium-high heat.
Place the chicken in the hot skillet and sear for 6 to 8 minutes per side until the exterior is golden brown and the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest for 5 minutes before slicing to keep the juices locked in.
Serve the sliced chicken alongside the warm roasted vegetables for a clean and balanced meal.