Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Slice the baby potatoes into halves or quarters so they are uniform in size for even roasting.
In a small bowl, whisk together the olive oil, minced garlic, dried rosemary, dried thyme, sea salt, and black pepper.
Place the chicken breast, potatoes, and trimmed asparagus on the prepared sheet pan.
Drizzle the herb oil mixture over everything, tossing the vegetables and coating the chicken thoroughly.
Slice the half lemon into thin rounds and place them directly on top of the chicken and asparagus.
Roast in the oven for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are fork-tender.
Let the chicken rest for 5 minutes before slicing to ensure it stays juicy and flavorful.