Preheat your oven to 400°F.
Season the chicken breast with salt, pepper, fresh rosemary, and garlic powder.
Place the seasoned chicken on a baking sheet and drizzle with half of the olive oil.
Roast the chicken in the oven for about 20-25 minutes or until it reaches an internal temperature of 165°F.
Meanwhile, peel and chop the sweet potato into cubes. Boil in lightly salted water until tender, about 15 minutes.
Once the sweet potatoes are soft, drain and mash them until smooth. Optionally, season with a pinch of salt and a drizzle of olive oil.
Trim the tough ends from the asparagus. Toss them with a little olive oil, salt, and pepper.
Place the asparagus on a separate baking sheet and roast in the oven for about 10 minutes until tender and slightly crisp.
Plate a portion of chicken breast with a generous serving of sweet potato mash and a side of roasted asparagus.
Serve warm and enjoy your balanced, herb-infused dinner.