Preheat a medium skillet over medium-high heat with 1 tablespoon of extra-virgin olive oil, 1 turn of the pan and 2 tablespoons of butter. Once the butter has melted add the crushed garlic cloves and the mushrooms, stem end up. Season with salt and pepper and cook for about 3 to 4 minutes or until the cap tops are brown. Flip the mushrooms to the other side, add the sherry, orange zest and juice and continue to cook for 3 to 4 minutes, or until the mushrooms are tender and cooked through. Add the parsley to the pan and toss to distribute. Serve hot or room temperature.