Here's the recipe: Home Style Macaroni and Cheese
with these modifications:
The whole box of macaroni (12 oz.)
1 3/4 cup milk, 1/4 cup cream
2 cups sharp white Cheddar, with 3/4 cup mixed cheese (the shredded, 6-cheese blend from Sargento, but you could use whatever sounds good/whatever is on-hand) sprinkled on top
1/2 package (8-10 crackers) Ritz crushed and sprinkled on top instead of the breadcrumbs
While this is definitely not "low-fat", I believe that, in moderation, good fat is important in our diets, so if you use quality ingredients (organic, if you like), this is a great dish that you can use as a main OR side dish.