Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
In a small glass bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, minced garlic, dried oregano, sea salt, and black pepper until the marinade is well emulsified.
Pat the chicken breast dry with a paper towel to ensure a better roast, then place it on one side of the prepared baking sheet.
Brush the chicken breast generously with half of the lemon-herb mixture, ensuring it is fully coated on all sides.
Trim the woody ends off the asparagus and arrange the spears in a single layer next to the chicken, drizzling them with the remaining herb mixture.
Roast for 18 to 22 minutes, or until the chicken reaches an internal temperature of 165°F and the asparagus is vibrant and tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing against the grain to lock in the juices and maintain a tender texture.