Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
In a small bowl, whisk together the extra virgin olive oil, fresh lemon juice, lemon zest, minced garlic, dried oregano, sea salt, and black pepper.
Place the chicken breast on one side of the prepared baking sheet and the trimmed asparagus spears on the other side.
Brush the chicken generously with the lemon-herb mixture and drizzle the remaining sauce over the asparagus, tossing the spears to ensure they are 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 asparagus is tender-crisp with slightly charred tips.
Remove from the oven and let the chicken rest for 5 minutes before slicing it against the grain to maintain juiciness.
Serve the sliced chicken immediately alongside the roasted asparagus, drizzling any remaining pan juices over the top.