Bring a large pot of water with 1 tsp of kosher salt to a boil. Add the whole baby red potatoes and cook for 20-30 minutes, until they are fork tender.
Drain potatoes and cut them in half, then quarter them. Add the potatoes to a large bowl and splash with 2 tbsp dill pickle juice while they're still hot.
Add the celery, red onion and scallions to the potatoes.
In a separate dish combine the mayo, sour cream, 1 tbsp dill pickle juice, garlic salt and black pepper. Whisk until smooth. Pour over potatoes and stir until coated. Garnish chopped green onion and more freshly cracked pepper.
Serve the potato salad warm or chill and serve. Enjoy!