Bring a large pot of lightly salted water to boil. Add pasta and cook 8-10 minutes or until al dente.
Preheat oven to 350 degrees. In a medium saucepan, heat soup and milk over medium heat until simmering. Remove from heat and stir in macaroni. Pour macaroni mixture into a 9x13 baking dish. layer cheese slices over macaroni, repeat.
Bake for 25 minutes or until cheese is golden and bubbly!
I get RAVE reviews on this one. One of my kids favorite meals.