Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Cut the sweet potato into thin wedges and trim the woody ends off the asparagus.
Pat the chicken breast dry with a paper towel to ensure the surface becomes crispy during roasting.
In a small bowl, whisk together the extra virgin olive oil, dried oregano, garlic powder, sea salt, and black pepper.
Place the chicken breast, sweet potato wedges, and asparagus on the prepared baking sheet.
Drizzle the herb oil mixture over the chicken and vegetables, tossing the produce to coat evenly.
Squeeze the juice of the lemon half over the chicken and vegetables, then place the spent lemon on the tray for extra fragrance.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are golden.
Allow the chicken to rest for 5 minutes before slicing to ensure it stays juicy.