In a large skillet, heat the ghee over medium-high heat. Add garlic, sauté for about 2 minutes until fragrant. Add zucchini, toss for another 3 minutes, or until tender. Add in the bone broth and season with salt and pepper and then toss in the chicken. Reduce heat to low, simmer for about 10 minutes, or until broth reduces by half, and then serve and garnish with cheese.