Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Halve the baby potatoes and toss them on the baking sheet with 0.25 tbsp of olive oil, a pinch of sea salt, and black pepper.
Roast the potatoes for 15 minutes while you prepare the chicken.
In a small bowl, whisk together the remaining olive oil, lemon juice, minced garlic, chopped rosemary, and thyme.
Pat the chicken breast dry and rub it thoroughly with the lemon-herb mixture and the remaining salt and pepper.
Remove the baking sheet from the oven, push the potatoes to one side, and place the chicken breast and trimmed asparagus on the tray.
Return the sheet to the oven and roast for another 18 to 20 minutes, or until the chicken reaches an internal temperature of 165°F.
Let the chicken rest for 5 minutes before slicing to ensure it stays juicy.