Boil the potatoes until just barely done the way you like them. Leave the peels on; they're good for you.
Hard boil the eggs. Use the best eggs you can for the most flavor.
Let the potatoes and eggs cool to room temp. Peel and dice and place in your bowl.
Mix in the MW, pickle relish, mustard, pimento. Fold in carefully to avoid breaking down the potatoes to mush.
Add salt and pepper to taste.
Chill in the fridge until you're ready to leave for the picnic, or whatever, at least an hour.