In a large saucepan, bring the potatoes to a boil in salted water. Boil for 10 minutes, or until the potatoes are tender.
Drain the potatoes and place them in a large bowl. Add the parsley, celery, and red onion.
In a small bowl, whisk together the olive oil, white vinegar, salt, and pepper. Pour over the potatoes and vegetables and mix until everything is evenly coated.
Cover and refrigerate for at least 2 hours before serving.
Interesting Facts
This dish is similar to the popular American potato salad, but with a South American twist.
Argentinean potato salad is a popular side dish at traditional Argentinean barbecues and gatherings.
The dish can be served either cold or at room temperature.