I just learned how to make homemade Mac and Cheese from Alton Brown
Wow,  e for Chosen Topic  Macaroni and cheese  Macaroni and cheese—also called mac and cheese in American, Canadian, and macaroni pie in Caribbean English; and macaroni cheese in the United Kingdom—is a dish of English origin, consisting of cooked macaroni pasta and a cheese sauce, 
The real trick is to make a homemade bechamel sauce to melt your cheese in. I prefer cheddar cheese, you?
I prefer macaroni , Traditional macaroni and cheese is a casserole baked in the oven; 
Well, if we are getting traditional, Thomas Jeffereson is responsible for the popularity of Macaroni and Cheese in the United States.
The cheese is often first incorporated into a Béchamel sauce to create a Mornay sauce, which is then added to the pasta. In the United States, it is considered a comfort food.
History.
Pasta and cheese casseroles have been recorded as early as the 14th century in the Italian cookbook, "Liber de Coquina", one of the oldest medieval cookbooks, which featured a dish of parmesan and pasta. A cheese and pasta casserole known as "makerouns" was recorded in the famous medieval English cookbook, the
Macaroni and cheese
Macaroni and cheese—also called mac and cheese or mac n cheese in American and Canadian English, macaroni cheese in the United Kingdom—is a dish of English origin, consisting of cooked macaroni pasta and a cheese sauce, most commonly cheddar. It can also incorporate other ingredients, such as breadcrumbs, meat and vegetables.
Traditional macaroni and cheese is a casserole baked in the oven; however, it may be prepared in a sauce pan on top of the stove or using a packaged mix.