Boil the eggs - I like to bring a pot of water to the boil, add a hearty dash of white vinegar, then gently add the eggs. For this recipe, I boil for 11 minutes. Remove from the water and run under cold water to cool enough to handle.
Boil the potatoes - I used mini red potatoes, cut in half, covered with cold water and added about a tablespoon of salt. Bring to a boil and let boil until the potatoes are tender. Drain and put them back into the pot.
Salt and pepper the potatoes lightly, add the butter, and lightly mash the potatoes.
Peel and cut the eggs into quarters and add to the potatoes. Mash in.
In a separate bowl mix the other ingredients, then add to the mashed potatoes. Lightly mash in, then continue to mix with a spatula.
Taste for any needed salt and pepper.
Place in a bowl, cover, and set in fridge to chill.