Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
Halve the baby potatoes and trim the woody ends off the asparagus spears.
In a small bowl, whisk together the extra virgin olive oil, lemon juice, dried oregano, garlic powder, sea salt, and black pepper.
Place the chicken breast, potatoes, asparagus, and cherry tomatoes onto the prepared sheet pan.
Drizzle the lemon-herb oil over the chicken and vegetables, tossing everything well to ensure an even coating.
Spread the ingredients out into a single layer, ensuring the chicken is not covered by the vegetables.
Roast 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 succulent.