Wash and scrub well. 3M makes a green scrubby that works well.
Prick the ends with a fork to let moisture escape during baking. This will make the potato fluffy instead of gummy.
Oil or butter lightly. I like butter for flavor but will use bacon grease if available.
Season lightly with kosher salt and a few twist of the pepper mill on all sides.
Place a baking sheet on the lower rack of your oven to catch any dripping from the potatoes.
Place the potatoes spaced ½ inch apart on the center rack and bake at 400°F for about 1 hour, depending on size. Potato will yield to pressure when done.
Cut open in wave shape with paring knife and squeeze ends.