Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Slice the sweet potato into 1/2-inch thick wedges and trim the tough, woody ends off the asparagus spears.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon zest, lemon juice, minced garlic, rosemary, thyme, sea salt, and black pepper.
Place the chicken breast, sweet potato wedges, and asparagus on the prepared sheet pan in a single layer.
Drizzle the lemon-herb marinade over the chicken and vegetables, using a brush or clean hands to ensure everything is evenly coated.
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 keep it juicy, then serve immediately with the roasted vegetables.