Boil the water for the potatoes and then add a little sea salt. Boil the potatoes for 7 minutes or until you can poke a fork through them.
Drain and rinse the potatoes under cool water. Add the potatoes to the refrigerator now for 1 hour.
Mix together the ingredients for the mayonnaise dressing. Taste and flavor with salt and pepper to your liking.
Add to the dressing to the potatoes and then add the onion, capers and herbs. Mix with tongs. Add additional sea salt and pepper as needed.
Squeeze another 1/2 lemon over the dish before serving.