mac and cheese is my favorite food to eat! and it is made in the americas, well as in canda and other places 
What are the origins of mac & cheese?
it was first found in a medieval english cookbook dating back to the 14th century
Wow, that's a long time ago. How is the dish prepared?
it is a dish of cooked macaroni pasta that contains cheese sauce, mostly cheddar
Can other ingredients be added?
it sure can! you can add things like breadcrumes, meat and vegetables to your liking of course!
I've never tried to make my own. I have only eaten the pre-packaged Kraft macaroni and cheese.