Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Wash the sweet potato and cut it into even wedges; trim the woody ends off the asparagus.
In a small mixing bowl, whisk together the olive oil, lemon zest, lemon juice, minced garlic, chopped thyme, and rosemary.
Place the chicken breast, sweet potato wedges, asparagus, and cherry tomatoes on the prepared baking sheet in a single layer.
Drizzle the lemon-herb oil mixture over the chicken and vegetables, tossing the produce slightly to coat.
Sprinkle the sea salt and black pepper evenly over all ingredients.
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 tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure it stays juicy.
Plate the sliced chicken alongside the roasted vegetables and serve immediately.