Cook the potatoes with their skins until done. Peel while still lukewarm, chop bite-sized and place in a large salad bowl. Peel and dice the onions and add to the potatoes. Halve the gherkins bite-sized or, depending on size, quarter and also add to the bowl.
Put the whole pineapple can with the juice into the salad (the size of the pineapple can depends on personal taste - I prefer a large can because the pineapple makes the potato salad fruity). Add the glass with half the cucumber stock from the gherkins to the potatoes. Mix everything together and add Miracel Whip. Season everything vigorously with salt and pepper.
Since the potatoes swallow the spices heavily, let them steep for about 1 hour until they are eaten.
To garnish, quarter 1 or 2 hard-boiled eggs and place over them with bunches of parsley.