Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
Wash and halve the baby potatoes, then trim the tough, woody ends off the asparagus spears.
In a large mixing bowl, combine the chicken breast, halved potatoes, and asparagus.
Drizzle with extra virgin olive oil and sprinkle with dried oregano, garlic powder, sea salt, and black pepper, tossing until everything is evenly coated.
Place the chicken and potatoes on the prepared baking sheet in a single layer, leaving space for the asparagus later.
Roast for 10 minutes, then remove the pan and add the asparagus to the sheet.
Return the pan to the oven and roast for another 12-15 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are fork-tender.
Remove from the oven and immediately drizzle with fresh lemon juice and garnish with the lemon zest before serving.