Preheat oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Finely mince the garlic, rosemary, and thyme.
In a small bowl, whisk together the olive oil, lemon juice, lemon zest, minced garlic, rosemary, and thyme to create the marinade.
Place the chicken breast on one side of the baking sheet and season both sides with half of the salt and pepper.
Arrange the trimmed asparagus on the other side of the sheet and sprinkle with the remaining salt and pepper.
Drizzle the lemon-herb oil mixture over both the chicken and the asparagus, tossing the asparagus to coat evenly.
Roast for 20-25 minutes until the chicken reaches an internal temperature of 165°F and the asparagus is tender and slightly charred.
Let the chicken rest for 5 minutes before slicing to ensure the juices remain locked inside for a tender finish.