Very simple and simply delicious
Wash potatoes and put in a pot. Cover with water and set to medium high heat, bring to a boil and cook for approximately 20 to 30 minutes. You should be able to stick a knife in the potato and it will smoothly enter the potato and come out easily, don't over cook then it becomes mashed potato's. let the potato's cool so you can handle, you will then need to peel and cut into small cubes 1/2 inch, and place in a bowl
mix the mayonnaise, mustard, salt and pepper into the chopped potato's. I do this when the potato's are still slightly warm, the dressing blends with the potato's much better than when it is cold.
Please note that I probably go a little light on the dressing, it is so much easier to add Mayonnaise, than to have to add more potato's if it is to wet with dressing. Sometimes I add a little garlic powder for an added flavor but this dish is delicious without.