Scalloped potatoes are definitely an indulgence, and even more so when you top them with a fine layer of freshly grated Parmesan cheese. But don't be surprised if you find yourself making this recipe for more than just the holidays because they're so delicious. And you better make a lot because people will come back for seconds and thirds.
Using a mandolin to slice potatoes almost paper-thin isn't necessary but it is recommended. Unless you have some seriously killer knife skills, it's hard to get the potatoes thin enough to cook quickly and to lend to the seriously delicious creamy taste they give to the dish. Of course, the cream that surrounds all of those thin potato slices will also help do the trick.