Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
In a small bowl, combine the ghee with minced garlic, finely chopped rosemary, thyme, sea salt, and black pepper, mashing with a fork until a smooth paste forms.
Slice the sweet potato into 1/4-inch thick rounds and trim the woody ends off the asparagus spears.
Pat the chicken breast dry with a paper towel and rub half of the garlic-herb ghee mixture thoroughly over all sides of the meat.
Place the sweet potato rounds and asparagus on the baking sheet, then toss them with the remaining ghee mixture until evenly coated.
Arrange the chicken in the center of the pan and spread the vegetables in a single layer around it to ensure even roasting.
Roast in the oven for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the sweet potatoes are fork-tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep the meat juicy and flavorful.