Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Peel and cube the sweet potato into 1-inch pieces, then toss with 0.5 tbsp of the olive oil and a pinch of the salt directly on the pan.
Roast the sweet potatoes for 10 minutes to give them a head start on caramelizing while you prepare the chicken.
In a small bowl, mince the garlic and whisk it together with the remaining olive oil, oregano, thyme, salt, and pepper.
Pat the chicken breast dry with a paper towel and rub the garlic-herb mixture evenly over all sides of the meat.
Remove the pan from the oven, move the potatoes to one side, and add the chicken breast, trimmed asparagus, and cherry tomatoes.
Return the pan to the oven and roast for 18-22 minutes until the chicken reaches an internal temperature of 165°F and the vegetables are tender.
Let the chicken rest for 5 minutes to lock in the juices before slicing and serving alongside the roasted vegetables.