The key element to this typically Bavarian recipe, which comes from my book An Appetite for Ale, is the addition of hot stock which gives it a consistency half way between a conventional potato salad and mashed potato. It also has the most delicious sweet-sour flavour.
1 kg of waxy new potatoes, peeled and cut into even-sized pieces
1 tsp vegetable bouillon powder
4 tbsp white malt vinegar
1/2 tsp salt
1/2 tsp caster sugar
1/4 tsp white pepper
2 tbsp sunflower or grapeseed oil
1 medium-sized mild or sweet onion, peeled and finely chopped
Fresh chives or dill
Put the potatoes in a pan, cover with cold water and bring to the boil. Simmer until tender - about 12-15 minutes. Drain, reserving the cooking water. Pour 150ml of the cooking water over the vegetable bouillon powder and stir. When the potatoes are cool enough to handle (about 5 minutes), slice them roughly into a bowl.
Put the vinegar in a small saucepan. Add the salt, caster sugar and pepper and stir to dissolve. Add the oil and the onion, bring to the boil then pour the hot dressing over the sliced potatoes and stir vigorously.
Melt the butter, add to the salad and stir again. Add a little more of the potato cooking water to give you a slightly sloppy consistency, a bit like lumpy mashed potato. Leave to cool and stand for about 2 hours for the flavours to develop. Sprinkle with snipped chives or finely chopped dill and serve with cold sliced sausage and ham, frankfurters or grilled bratwrst
* Sometimes the locals add cucumber. Take half a cucumber, peel it, halve it and scoop out the seeds with the tip of a teaspoon. Cut into slices, put in a shallow plate, sprinkle with salt and put another weighted plate on the top. Leave for about 20 minutes then rinse the cucumber and pat dry. Dress with a little white vinegar seasoned with salt and sugar and a splash of sunflower oil and mix in with the potato. (Or you could serve it on its own sprinkled with a little fresh dill)
What to drink: Given this is a typical Munich salad you should drink an authentic Munchener helles or Marzen lager with it - or a Czech golden lager, at a pinch.