Add potatoes to a large saucepan.
Fill with just enough water to cover potatoes. Any excess water will add to cooking time - you will be cooking all the water off.
Bring to a rapid boil, gently stirring until salt is dissolved.
Reduce heat just a little to maintain steady boil. Stir occasionally & gently.
Do not stir or move potatoes once water is almost completely evaporated.
When water is completely evaporated (25 - 30 mins) remove from heat and let rest for a few minutes.
Carefully remove potatoes from saucepan. Rinse excess salt from sauce pan. Wipe off or rinse any potatoes with excess amounts of salt on them.
Add potatoes back to saucepan. Fill with 1/4" - 1/2" water. Bring to a boil, stir once or twice, and cook until water is completely evaporated, about 5 minutes.
Remove from heat. Let rest for a few minutes. Serve with butter & sour cream. Enjoy