Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Place the cubed sweet potato, sliced carrots, broccoli florets, and sliced bell peppers on the baking sheet.
Drizzle the vegetables with half of the olive oil and sprinkle with half of the salt, pepper, garlic powder, and oregano.
Toss the vegetables until evenly coated and roast for 20 to 25 minutes until the sweet potatoes are tender and golden.
While the vegetables roast, season the chicken breast with the remaining salt, pepper, garlic powder, and oregano.
Heat the remaining olive oil in a large skillet over medium-high heat.
Add the chicken to the pan and sear for 6 to 7 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 and serving alongside the roasted vegetables.