Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
In a small bowl, whisk together the extra virgin olive oil, lemon juice, lemon zest, minced garlic, dried oregano, sea salt, and black pepper.
Place the chicken breast, halved baby potatoes, broccoli florets, and sliced carrots onto the prepared baking sheet.
Pour the lemon-herb marinade over the chicken and vegetables, using your hands or tongs to ensure everything is thoroughly and evenly coated.
Spread the ingredients into a single layer, ensuring the chicken has enough space to roast properly without steaming.
Bake for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are fork-tender and golden.
Remove from the oven and let the chicken rest for 5 minutes before slicing; garnish with fresh parsley for a burst of color.