n n Wash and peel the potatoes, cut into small pieces. Cook in boiling water, then drain it. Mash the potatoes with a fork, set aside.n n Cook the hard boil egg , peel it and mash it with a fork as well.n n Mix all the ingredients together in a large bowl, season with salt and pepper.n n Then add mayonnaise and vinegar and mix well.n n Place in the fridge for at least 30 minutes before serve.nn