Wash the potatoes, put them in a saucepan, cover with water, bring to the boil and cook for approx. 30 minutes. Let the potatoes cool, peel, cut into slices and place in a bowl.
Heat the olive oil in a pan and allow the finely diced shallots to become translucent. Deglaze with orange juice and reduce to half. Stir in the mustard, balsamic vinegar and stock / stock. Season the salad dressing with salt and pepper, pour over the potato slices and mix in the orange peel.