1Heat coals or gas grill for direct heat. Gently scrub potatoes. Pierce potatoes several times with fork to allow steam to escape while potatoes bake.
2Pour 1-inch layer of salt in bottom of 2 disposable aluminum loaf pan, 8 1/2x4 1/2x2 1/2 inches. Place 2 potatoes in salt in each pan; pour salt over potatoes until completely covered.
3Cover and grill potatoes over medium heat 1 hour to 1 hour 15 minutes or until potatoes feel tender when pierced in center with fork. Carefully remove potatoes from salt.