Rustic Potato Loaves

• 1996 scrub the potatoes
• 1,900 gr pot
• 600 gr unbleached all-purpose flour
• 425 gr russet potatoes
• 120 ml tepid reserved potato water
• 120 ml potato water
• 30 ml extra-virgin olive oil
• 12 gr dry yeast (active)
• 12 gr salt
• 6 gr salt