Ingredients
1 kg moderately waxy potatoes boiled peeled and roughly chopped into 2cm cubes
1 medium brown onion finely chopped
sufficient white wine vinegar to dampen the onion
olive oil to taste preferably lighter than extra virgin
salt
Method
Add the vinegar and some salt to the chopped onion and let it sit while the potatoes cook or longer if possible.
Boil the potatoes in well salted water until they are soft. They should break up a little when mixed with the onion and vinaigrette
Allow potatoes to cool a little, peel and chop them. Mix the oil with the onion and vinegar. The mixture should be quite tart. Add salt until the palate fills.
Thoroughly mix in the potatoes.
Set aside to cool stirring the salad occasionally.
Remarks
This sounds so simple that one assumes it will be bland. It's not. The onion takes on a lot of acidity adding life and crunch to the potato. The trick is balancing the salt, vinegar and potato. You may notice that pepper is not included, you could add it but it may detract from the simple clean taste. Claudia Roden suggests adding chopped flat leaf parsley - it's up to you.