Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Pat the chicken breast dry with paper towels and cut it into 1-inch bite-sized cubes.
Clean the mushrooms with a damp cloth and slice them in half, ensuring they are uniform in size for even roasting.
In a small bowl, whisk together the melted ghee, olive oil, minced garlic, chopped thyme, and rosemary.
Place the chicken and mushrooms on the prepared baking sheet and drizzle with the garlic-herb mixture.
Season with sea salt and black pepper, then toss thoroughly to ensure every piece is well-coated.
Spread the mixture into a single layer, ensuring the chicken and mushrooms are not overcrowded.
Roast for 18 to 22 minutes, or until the chicken is cooked through and the mushrooms are tender and caramelized.
Remove from the oven and garnish with fresh chopped parsley before serving warm.