Peel and thinly slice the jacket potatoes and place in a bowl. Add the finely chopped chives, finely diced onions and finely chopped radishes. Mix the mustard, Miracel Whip, Cremefine, vegetable stock, balsamic vinegar, pepper and salt into a homogeneous dressing and pour over the potatoes. Mix well and let steep for 2 - 3 hours. The salad tastes fridge-cold as well as at room temperature. This version is the lower-fat one, but it tastes like the original. The Original uses mayonnaise instead of Miracel Whip and creme fraiche instead of Cremefine.