From America's Test Kitchens, where they tested many, many recipes and came up with the perfect version of this classic dish. Part of the key to making this perfecto is having the serving bowl(s) kept warm. Do this by partially filling the bowls with boiling water and dumping them before placing the pasta in the dish. DO NOT use Kraft Parmesan "cheese" as ATK tested Parmesans and Parmigianno Reggiano and Kraft cheese came out being deemed "salty sawdust". ATK recommends using fresh pasta, though dry pasta will do. Be sure to use 9 oz.