Macaroni and Cheese Grilled Cheese

I had some leftover macaroni and cheese and decided to make it into a grilled cheese sandwich. I was surprised by how good it was, but then again, how could it not be good? Macaroni and cheese melted between two pieces of bread grilled in butter? Delicious. No real recipe here, just take some leftover macaroni and cheese (preferably chilled, it holds together better) and grill it between two slices of bread with some shredded cheddar cheese to hold it all together.