Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Slice the baby potatoes into halves and trim the tough, woody ends off the asparagus spears.
In a small mixing bowl, whisk together the extra virgin olive oil, fresh lemon juice, lemon zest, minced garlic, dried oregano, sea salt, and black pepper.
Arrange the chicken breast, halved baby potatoes, and asparagus spears in a single layer on the prepared baking sheet.
Drizzle the lemon-herb marinade over the chicken and vegetables, tossing the produce and turning the chicken to ensure everything is evenly coated.
Bake 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 keep it juicy.