Authentic German potato salad (Kartoffelsalat):

Ingredients:

- 4 large potatoes, peeled and diced

- 1/4 cup vegetable oil

- 2 tablespoons white wine vinegar

- 1 tablespoon German mustard (e.g., Düsseldorfer or whole-grain)

- 1 teaspoon sugar

- Salt and pepper to taste

- 2 tablespoons chopped fresh parsley

- 2 tablespoons chopped fresh chives

- 2 tablespoons chopped red onion (optional)

- 2 hard-boiled eggs, diced (optional)

- 2 tablespoons capers (optional)

Instructions:

1. Boil the potatoes in salted water until tender. Drain and let cool.

2. In a large bowl, whisk together oil, vinegar, mustard, sugar, salt, and pepper.

3. Add the cooled potatoes, parsley, chives, onion (if using), eggs (if using), and capers (if using) to the bowl.

4. Toss gently to combine, being careful not to mash the potatoes.

5. Taste and adjust seasoning as needed.

6. Cover and refrigerate for at least 30 minutes to allow flavors to meld.

7. Serve chilled, garnished with additional parsley if desired.

Authenticity notes:

- German potato salad typically uses a neutral-tasting oil like canola or grapeseed, not olive oil.

- White wine vinegar is traditional; apple cider vinegar can be substituted if needed.

- German mustard adds a distinct flavor; whole-grain mustard can be used for a slightly spicier taste.

- Sugar helps balance the acidity; adjust to taste.

- Fresh herbs are essential; parsley and chives are classic choices.

- Red onion, eggs, and capers are optional but add depth and texture.

Enjoy your delicious and authentic German potato salad!