Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Wash and halve the baby potatoes, and trim the woody ends off the asparagus spears.
Mince the garlic cloves and finely chop the fresh rosemary and thyme leaves.
In a large mixing bowl, toss the halved potatoes with half of the olive oil, half of the minced garlic, and a pinch of sea salt and pepper.
Spread the seasoned potatoes onto the prepared sheet pan and roast for 15 minutes to give them a head start.
While the potatoes roast, rub the chicken breast with the remaining olive oil, garlic, rosemary, thyme, sea salt, and pepper.
Remove the pan from the oven, move the potatoes to one side, and place the chicken breast and asparagus on the other side.
Return the pan to the oven and roast for another 15 to 20 minutes, or until the chicken reaches an internal temperature of 165°F.
Drizzle the fresh lemon juice over the chicken and asparagus just before serving to brighten the savory flavors.