Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Pat the chicken breast completely dry with paper towels to ensure the marinade sticks and the meat roasts beautifully.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, minced garlic, chopped rosemary, thyme, sea salt, and black pepper.
Place the chicken breast and the trimmed asparagus spears onto the prepared baking sheet.
Brush the chicken generously with half of the lemon-herb mixture, then drizzle the remaining half over the asparagus, tossing the spears to coat evenly.
Roast in the center of the oven for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the asparagus is tender and slightly charred.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure it remains juicy and tender.