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 small mixing bowl, whisk together the extra virgin olive oil, dried oregano, garlic powder, sea salt, and black pepper.
Place the chicken breast, halved potatoes, and trimmed asparagus onto the prepared baking sheet.
Drizzle the herb oil mixture over the chicken and vegetables, tossing the produce and coating the chicken thoroughly.
Thinly slice the lemon and mince the garlic clove, then arrange the lemon slices and garlic over the chicken and 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 let the chicken rest for 5 minutes before slicing to ensure it stays moist and flavorful.