Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Peel and dice the sweet potato into 1/2-inch cubes, and chop the broccoli and bell pepper into bite-sized pieces.
Place the vegetables on the prepared baking sheet and drizzle with the extra virgin olive oil.
Sprinkle the sea salt, black pepper, and dried oregano over the vegetables, tossing until they are evenly coated.
Roast the vegetables for 20-25 minutes, tossing halfway through, until the sweet potatoes are fork-tender and the edges are slightly caramelized.
While the vegetables roast, poach or pan-sear the chicken breast until the internal temperature reaches 165°F.
Allow the chicken to rest for 5 minutes, then use two forks to shred it into thin, uniform strips.
Season the shredded chicken with garlic powder and onion powder, tossing to ensure the spices are well distributed.
Combine the warm shredded chicken with the roasted vegetables in a large bowl and serve immediately.