Baked potato:
Preheat the oven to 400°F. Line a baking sheet with aluminum foil.
Peel the potato and cut the entire top of the potato into thin crosswise slices (about ⅛-inch thick), stopping about three-quarters of the way down the potato so the base stays intact and the pieces remain attached to the base.
Add salt and paprika, and then place them on the prepared baking sheet.
Roast the potatoes until they are golden and easily pierced with a fork, 20 to 25 minutes.
Remove the baking sheet from the oven and rub sliced cheddar and Parmesan evenly across the top of each potato. Return the baking sheet to the oven and cook until the cheese is melted.