Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Halve the baby potatoes and trim the tough, woody ends off the asparagus spears.
Place the chicken breast, halved potatoes, and trimmed asparagus onto the prepared sheet pan.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon juice, dried rosemary, garlic powder, sea salt, and black pepper.
Drizzle the herb oil mixture over the chicken and vegetables, tossing the potatoes and asparagus to coat evenly and brushing the chicken on both sides.
Arrange everything in a single layer, ensuring the chicken is not covered by the vegetables.
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 garnish the entire dish with fresh lemon zest before serving warm.