Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Dice the chicken breast and the half sweet potato into uniform 1-inch cubes to ensure they cook at the same rate.
Chop the broccoli into bite-sized florets and slice the red bell pepper into 1-inch wide strips.
Place the chicken cubes, sweet potato, broccoli, and bell peppers onto the prepared baking sheet.
Drizzle the extra virgin olive oil over the chicken and vegetables.
Evenly sprinkle the sea salt, black pepper, garlic powder, and dried oregano over the mixture.
Toss everything thoroughly with your hands or tongs until every piece is well-coated in oil and spices.
Spread the ingredients into a single layer, ensuring they are not overcrowded so they roast rather than steam.
Bake for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender with slightly charred edges.
Remove from the oven and let rest for 2 minutes before serving.