Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
Wash and halve the baby potatoes, and trim the woody ends off the asparagus spears.
Mince the garlic clove and finely chop the fresh rosemary and thyme leaves.
In a mixing bowl, toss the halved potatoes with 0.5 tbsp of olive oil, half of the minced garlic, half of the herbs, and a pinch of salt and pepper.
Spread the potatoes onto one side of the prepared baking sheet and roast for 15 minutes.
While potatoes roast, rub the chicken breast with the remaining 0.5 tbsp of olive oil, the rest of the garlic, herbs, 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.
Squeeze the juice from the lemon over the chicken and asparagus, then place the lemon halves on the tray for extra aroma.
Return the pan to the oven and roast for an additional 18-20 minutes, or until the chicken reaches an internal temperature of 165°F.
Let the chicken rest for 5 minutes before slicing and serving alongside the crispy potatoes and tender asparagus.