rock salt to put on the bottom and around the potatoes
Scrub the potatoes; do not peel. Preheat the oven to 425 degrees.
Using a fork, prick the potatoes several times so the steam can escape and they don't explode.
Brush the outside of the potatoes lightly with olive oil
Pour rock salt into roasting pan in a 1-inch layer. Place the potatoes on top of the layer of rock salt. Add more rock salt to pack potatoes in place
Put in oven and bake for 1 hour. Serve with what ever you choose to put on them. You can reuse the rock salt after it cools just put it in a bag.