Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Wash and trim the woody ends off the asparagus, and cut the sweet potato into 1/2-inch thick wedges.
Mince the garlic cloves and finely chop the fresh rosemary and thyme leaves.
Place the chicken breast, sweet potato wedges, and asparagus on the prepared sheet pan in a single layer.
Drizzle the extra virgin olive oil over the chicken and vegetables, then squeeze the juice of half a lemon across the entire tray.
Evenly sprinkle the minced garlic, rosemary, thyme, sea salt, and black pepper over everything, tossing the vegetables slightly to coat.
Roast in the center of the oven for 20 to 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 let the chicken rest for 5 minutes before slicing to ensure it stays juicy.