Preheat the oven to 450 degrees F.

Wash the potatoes well and place them on a paper towel. With a fork, pierce holes in several places around the potatoes.

In a large mixing bowl, combine the water and salt. Roll the potatoes in brine solution several times to coat well. Remove and place on a wire rack on a baking sheet.

Bake for 45 to 50 minutes or until the internal temperature is 210 degrees F.

Remove from the oven and brush with bacon grease, or vegetable oil and give them a light sprinkling of margarita salt. Bake for an additional 10 minutes.

Remove from the oven and cut open immediately to let the steam release. Serve warm.