Peel and dice potatoes. Cover in cold water, rinsing and draining about 3 times. This will remove extra starch and the potatoes will not be mushy.
Cover with cold water once more and add a teaspoon of kosher salt. Cook over high heat, bringing the potatoes to a boil. Cook just until fork tender, about 10 minutes depending on the size of the potatoes.
Drain well and set aside.
Place the diced red onion on top of the warm potatoes.
In a large serving bowl, add sour cream, mayonnaise, mustard, pickle relish, candied jalapeños, apple cider vinegar, sugar, garlic, dill, remaining teaspoon of kosher salt, pepper and smoked paprika.
Whisk together until well combined
.Add the potatoes and red onions to the dressing and stir until well combined.
Garnish with additional jalapenos and red onion if desired.
Cover and refrigerate 2 hours or over night.