[Scuba]

If you are using store bought stock, try to use the low sodium stuff. Also, a little bit of stock goes a long way. No need to put in half a litre to one litre of stock. I used about 300-400 ml of my home made stuff and topped it off with just water.

1) Add the other potatoes and top off with water so that everything is covered. Bring the heat up until it is boiling then bring the heat back down to a shimmer. Cover it up and let the pot shimmer for about 20-30 minutes.
2) To finish the soup, if you don't have a blender, use a masher.
3) If the soup is too thin to your liking, grate in some potato. It will thicken it up. Just let the grated potato cook for a few minutes.