Take oven rack out and set on counter, then preheat oven to 400.

Pierce the skin of each potato a few times on each side with the tip of a knife or the tines of a fork. Rub potatoes all over with the fat of your choice (oh, and don't let me limit you. Did you save those chorizo drippings? Lard? Duck fat?) and set on the oven rack.

Sprinkle generously with flaked sea salt and grind profusely with black pepper.

Place oven rack in the middle of the oven, and bake for 1 hour.