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, then place them on the baking sheet and toss with 0.5 tbsp of olive oil, sea salt, and black pepper.
Roast the potatoes in the preheated oven for 10 minutes to give them a head start.
While potatoes roast, mince the garlic and whisk together the remaining olive oil, lemon juice, lemon zest, garlic, rosemary, and thyme in a small bowl.
Pat the chicken breast dry with a paper towel and coat it thoroughly with half of the lemon-herb mixture.
Remove the sheet pan from the oven, push the potatoes to one side, and place the chicken breast and trimmed asparagus onto the pan.
Drizzle the remaining lemon-herb mixture over the asparagus and toss lightly to coat.
Return the pan to the oven and roast for an additional 15 to 20 minutes, or until the chicken reaches an internal temperature of 165°F.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure it stays juicy and tender.