my favorite delicacy is Macaroni and cheese
Great taste! Mac and cheese is so traditional and a classic! I think it is best when baked in the oven.
ok ,where is the earliest history of mac and cheese?
I'm not sure of the exact origins, but I read somewhere that the dish was recorded in a medieval English cookbook in the 14th century!
how are they prepared?
"Forme of Cury", which was also written in the 14th century. It was made with fresh, hand-cut pasta which was sandwiched between a mixture of melted butter and cheese. The recipe given (in Middle English) was:
This is the above recipe in modern English: 
The first modern recipe for macaroni and cheese was included in Elizabeth Raffald's 1770 book, "The Experienced English Housekeeper". Raffald's recipe is for a Béchamel sauce with cheddar cheese—a Mornay sauce in French cooking
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.