Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Halve the baby gold potatoes and trim the woody ends off the asparagus spears.
In a small bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, minced garlic, chopped rosemary, sea salt, and black pepper.
Place the chicken breast, potatoes, and asparagus on the prepared baking sheet in a single layer.
Drizzle the lemon-herb oil mixture over the chicken and vegetables, tossing the vegetables and coating the chicken thoroughly.
Roast in the oven for 20-25 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 keep it juicy.
Plate the chicken alongside the roasted potatoes and asparagus, drizzling any remaining pan juices over the top.