Wash the potatoes and cook covered for about 25 minutes. Quench, peel and let cool off.
Dice the bacon. Peel and chop the onions. Fry bacon in a pan until crispy. Add oil and onions, fry until transparent. Sprinkle sugar over it and let it melt. Add vinegar, good 1⁄4 l water and broth, bring to the boil. Simmer for 3-4 minutes, season and let cool down a bit.
Cut the potatoes into slices. Pour hot bacon marinade over them. Leave to stand for at least 2 hours.
Wash parsley and chives, chop finely and mix into the bacon and potato salad. Season to taste and enjoy lukewarm or cold.