Peel and quarter potatoes. Place potatoes in a large sauce pan and cover with water. Add onion, garlic, and salt. Bring to a boil and cook for 15 minutes or until tender. Preheat broiler to high. Drain potatoes, add salt, 4 tablespoons of butter, pepper, nutmeg, and parsley. Mash the potatoes. Spoon into a buttered baking dish and smooth top. Sprinkle with Parmesan cheese and dot with butter. Broil for 7 minutes or until the top is golden brown.{$7e}(Original recipe for 4)