Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Pat the chicken breast dry with a paper towel and cut it into 1-inch bite-sized cubes.
Wipe the mushrooms clean with a damp cloth and slice them in half; trim the woody ends off the asparagus spears.
In a small microwave-safe bowl, melt the ghee and whisk in the minced garlic, dried thyme, sea salt, and black pepper.
Place the chicken, mushrooms, and asparagus on the prepared baking sheet and pour the garlic-herb ghee over them.
Toss everything together until the ingredients are thoroughly and evenly coated, then spread them out in a single layer.
Roast for 18-20 minutes, or until the chicken is cooked through and the mushrooms have developed a golden-brown color.
Remove from the oven and garnish with freshly chopped parsley before serving warm.