Best cheeseburgers
These diner-style cheeseburgers have gooey melted cheese and all the fixings - the ultimate American beef burgers for a barbecue feast
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.