Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Pat the chicken breast dry with paper towels and cut into 1-inch bite-sized pieces.
Clean the cremini mushrooms with a damp cloth and slice them in half, or leave them whole if they are small.
In a small bowl, whisk together the melted ghee, extra virgin olive oil, minced garlic, chopped thyme, and chopped rosemary.
Place the chicken and mushrooms on the prepared baking sheet and pour the garlic-herb mixture over them.
Sprinkle with sea salt and black pepper, then toss thoroughly to ensure every piece is well-coated.
Spread the mixture in a single layer, ensuring the chicken and mushrooms aren't overcrowded to allow for proper browning.
Roast for 18-22 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.