Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Trim the woody ends off the asparagus and mince the garlic cloves.
In a small bowl, whisk together the olive oil, the juice of half a lemon, minced garlic, rosemary, thyme, sea salt, and black pepper.
Place the chicken breast and asparagus on the prepared baking sheet and drizzle the lemon-herb mixture over everything, tossing well to ensure even coating.
Arrange the chicken in the center and the asparagus in a single layer around it.
Roast for 18 to 22 minutes, or until the chicken reaches an internal temperature of 165°F and the asparagus is tender and slightly browned.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy.