Serious macaroni and cheese for serious macheads. This easy, non-baked recipe comes from Quick and Simple magazine April 2006. Top quality Gruyere or Emmenthal can be substituted for the appenzeller. Wikipedia states: "Appenzeller cheese is a hard cow's-milk cheese produced in the Appenzell region of northeast Switzerland. An herbal brine, sometimes incorporating wine or cider, is applied to the wheels of cheese while they cure, which flavours and preserves the cheese while promoting the formation of a rind. Appenzeller has a documented history of at least 700 years. Today, about 75 dairies produce it, each with a different recipe for their brine wash. Most of the recipes are trade secrets. The cheese is straw-colored, with tiny holes and a golden rind. It has a strong smell and a nutty or fruity flavour, which can range from mild to tangy, depending on how long it is aged".