Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Peel and cube the sweet potato into half-inch pieces, chop the broccoli into small florets, and slice the bell pepper into strips.
Place the vegetables on the baking sheet, drizzle with half of the olive oil, and sprinkle with sea salt and black pepper.
Roast the vegetables for 20 to 25 minutes, tossing halfway through, until they are tender and slightly caramelized.
While the vegetables roast, poach the chicken breast in simmering water for 12 to 15 minutes or until the internal temperature reaches 165°F.
Remove the chicken from the water, let it rest for a few minutes, then use two forks to shred it into bite-sized pieces.
In a small bowl, whisk together the remaining olive oil, garlic powder, onion powder, and dried oregano.
Toss the shredded chicken with the herb oil until evenly coated.
Combine the seasoned shredded chicken with the roasted vegetables on a plate and serve immediately.