Peel and chop the onion as small as possible. Chop the parsley as well.

When the potatoes are almost cooked, pour off the water and leave to cool. They are still cooking, so don't boil them to mush. Peel the potatoes once they have cooled.

Mix the ingredients into a potato salad and season with salt and pepper. Aioli potato salad will only get better in the fridge for a couple of days.