Preheat your oven to 400°F (200°C) and line a large rimmed sheet pan with parchment paper for easy cleanup.
Wash and dice the baby gold potatoes into 1/2-inch cubes so they roast evenly.
In a small bowl, toss the potatoes with 0.5 tablespoons of olive oil, half of the sea salt, and half of the black pepper.
Spread the potatoes in a single layer on the prepared sheet pan and roast for 15 minutes.
While the potatoes are roasting, pat the chicken breast dry and rub with the remaining 0.5 tablespoons of olive oil, dried oregano, dried basil, and garlic powder.
Remove the pan from the oven, slide the potatoes to one side, and place the seasoned chicken breast and cherry tomatoes on the other side.
Return the pan to the oven and roast for an additional 15 to 20 minutes, or until the chicken reaches an internal temperature of 165°F and the tomatoes have blistered.
Let the chicken rest for 5 minutes before slicing to keep it juicy, then garnish the entire dish with freshly chopped parsley.