I rub mine with olive oil and roll in salt. If you can cook your potatoes in a foil pan with about a half inch of kosher salt on the whole bottom. I saw this on americas test kitchen. It actually pulls a lot of moisture out of the potatoe making it very white and fluffyalong with crispier skin. You will actually see the moisture collect in the salt underneath the potatoe. I keep my kettle at about 350 degrees.
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