Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Wash and dice the gold potatoes into 1/2-inch cubes and trim the tough, woody ends off the asparagus spears.
Place the chicken breast, diced potatoes, and asparagus on the prepared baking sheet in a single layer.
In a small glass jar or bowl, whisk together the olive oil, minced garlic, chopped rosemary, thyme, and the juice and zest of the lemon half.
Drizzle the lemon-herb oil mixture over the chicken and vegetables, using your hands or tongs to toss the produce until every piece is well-coated.
Evenly sprinkle the sea salt and black pepper over the entire tray.
Roast in the center of the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are fork-tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure the juices stay locked in.