Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Wash and dice the red potatoes into small 1/2-inch cubes, and trim the woody ends off the asparagus spears.
In a small bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, minced garlic, dried thyme, dried rosemary, sea salt, and black pepper.
Place the chicken breast, diced potatoes, and asparagus on the prepared sheet pan.
Drizzle the lemon-herb marinade over the chicken and vegetables, tossing everything thoroughly to ensure an even coating.
Spread the ingredients out into a single layer, ensuring the chicken is not covered by the vegetables to allow for even browning.
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 potatoes are fork-tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy.
Serve the sliced chicken alongside the roasted asparagus and potatoes, drizzling any remaining pan juices over the top.