1.25 kg baby red potatoes
1 large red onion, halved and cut into thin half-moons
100 ml white wine vinegar
150 ml sour cream
3 tbsp mayonnaise
1 tbsp Dijon mustard
2 celery stalks, finely diced
1 gherkin, finely chopped
2 tbsp dill, chopped
- Put the potatoes in a pan of cold salted water and bring to the boil. Simmer for 15 mins or until tender and a knife goes in easily. Meanwhile, combine the onion and vinegar in a large bowl, cover and set aside.
- Drain the potatoes and return to the pan, then stand for 5 mins to steam-dry. Slice them into bite-sized pieces and add to the bowl with the onion and vinegar, season with salt to taste and toss to combine. Cover and chill until cold.
- Combine the soured cream, mayonnaise and mustard, then add to the cold potatoes with the celery, gherkin and dill. Stir with a spatula until well combined, taking care not to break up the potatoes too much. Season to taste, then chill for at least 1 hr before serving.