Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Dice the sweet potato into 1/2-inch cubes and chop the red bell pepper into bite-sized pieces.
Place the chicken breast, sweet potato cubes, broccoli florets, and bell peppers onto the prepared baking sheet.
In a small bowl, whisk together the extra virgin olive oil, lemon juice, dried oregano, garlic powder, sea salt, and black pepper.
Drizzle the lemon-herb mixture over the chicken and vegetables, tossing thoroughly to ensure everything is evenly coated.
Arrange the ingredients in a single layer, ensuring the chicken has enough space to roast evenly.
Roast in the oven for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the sweet potatoes are fork-tender.
Remove from the oven and garnish with freshly chopped parsley before serving.