Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Dice the sweet potato into 1/2-inch cubes and trim the woody ends off the asparagus stalks.
In a small bowl, whisk together the garlic powder, dried rosemary, dried thyme, sea salt, and black pepper.
Place the chicken breast, sweet potato cubes, and asparagus on the prepared baking sheet.
Drizzle the olive oil over the chicken and vegetables, then sprinkle the herb seasoning mixture evenly over everything.
Toss the vegetables to ensure they are well-coated and flip the chicken to season both sides.
Roast in the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the sweet potatoes are golden and tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing and serving.