This is an old family recipe, passed down through generations. In fact, there is no BBQ in my family without this treat, so let me pass this on to you, to spread a little Austrian vibe to your picnic or BBQ ;-)
The dressing, containing hot broth, makes it special. The only ingredient I altered in this recipe, compared to my ancestors, is the vinegar. The original recipe calls for apple vinegar. My family always uses homemade apple vinegar which may sometimes tastes quite sharp. So I switched this ingredient to white wine vinegar instead.
As for the potatoes, don’t use too big ones as they will break when scliced. —Ursula | Lil Vienna
6 (side dish)
(900 g) waxy potatoes, all about the same size, rather small to medium ones
medium yellow onion, diced finely (3.5 oz / 100g)
(28 g) unsalted butter
(80 ml) white wine vinegar or mellow apple vinegar
1 tablespoon (200 ml) vegetable broth
tarragon mustard (substitute with savory-hot mustard like spicy brown if you can not find)
(80 ml) sunflower oil (or any other neutral-tasting oil)
Simmer the potatoes for 25-30 minutes, or until tender and they can be easily pierced with a fork. Drain the potatoes and set aside to cool slightly.
When potatoes are cool enough to handle but still warm, peel and cut them into thin slices (not thicker than 1/8 inch). Set aside in a big bowl.
Heat butter in a pan over medium heat, add diced onion and cook until translucent, 3-4 minutes.
Deglaze onion with vinegar, add soup and salt.
Bring the liquid to a boil and let it cook over low medium heat for 2 minutes.
Toss the potatoes with vinegar-broth, add mustard, give it a stir, then add oil and mix carefully.
Cover bowl with a lid and let rest for at least 30 minutes so the potatoes are able to absorb some of the dressing.
Potato salad is consumed either warm (after 30 of resting) or chilled (when resting longer).
Before serving, give the salad a stir, taste it, add little salt if necessary and sprinkle with chopped parsley.
NOTE: This salad can easily be prepared in advance. The dressing is good for a ½ hour to 3 hour resting time. If you let the salad rest longer – over night for example – prepare slightly more dressing, because the potatoes will continue absorbing it. Otherwise, the salad might turn out too dry.