01
Boil and cool potatoes
Start by putting the potatoes in a big pot and covering them with salted water. Bring it to a boil, then lower the heat to a gentle simmer and cook until the potatoes are tender when poked with a fork, about 15 to 20 minutes. Drain the water and let the potatoes cool for around 15 minutes. Once cooled, chop them into chunky pieces.
02
Mix Dressing and Potatoes
In a large bowl, mix together the salad dressing, sour cream, chopped onion, parsley, chives, sweet relish, dill relish, mustard, sugar, basil, and celery seed. Add the potatoes to the bowl and gently stir everything until the potatoes are well coated with the dressing.
03
Chill to Marinate
Cover the bowl and pop it in the fridge for at least 12 hours, or up to 24, to let all those flavors meld together. When you’re ready, give it a quick stir and serve chilled.