Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Dice the red potatoes into half-inch cubes and place them on the sheet pan, tossing with half of the olive oil and a pinch of salt and pepper.
Roast the potatoes for 12 minutes to give them a head start on becoming golden and crispy.
While potatoes roast, mince the garlic and finely chop the fresh rosemary and thyme.
Rub the chicken breast with the remaining olive oil, minced garlic, chopped herbs, sea salt, and black pepper.
Remove the pan from the oven, push potatoes to one side, and add the seasoned chicken breast and the trimmed asparagus spears.
Slice the half lemon into thin rounds and lay them across the chicken and asparagus to infuse them with bright citrus notes.
Return the pan to the oven and roast for another 15 to 18 minutes, or until the chicken reaches an internal temperature of 165°F and the asparagus is tender.
Let the chicken rest for 5 minutes before slicing to ensure it stays juicy and flavorful.