Potato Leek Soup

This was another easy soup that Marsha and I used to make. We ate it a lot because it costs about $.47 to make. And it's delicious!

--3 Russet Potatoes
--1 Leek stalk
--Water
--Kosher Salt or Sea Salt
--Fresh-Ground Black Pepper
--3 to 5 tbsp Butter

Wash potatoes and cube. Leave on the skins. Cut the leeks into 1/2 inch pieces, then rinse well in a bath of cold water (leeks like to collect mud, so it's a futile effort to clean them until after they have been cut). Put the potatoes and leeks into a stockpot and add water to a level of about half an inch above the veggies. Cover and simmer over medium heat for about 45 minutes or until the potatoes are tender. Season with a lot of salt and pepper to taste, then stir in the butter.