Southern Potato Salad

Prepare the Potatoes - Peel and dice the potatoes into ¾-inch cubes. Immediately place them in a large saucepan. Add enough cold water to cover them by 1 inch.
Boil the Potatoes - Bring the water to a boil over high heat. Once it starts to bubble, add 1 tablespoon salt and stir to dissolve. Reduce to a simmer over medium heat, adjusting as needed. Stir occasionally and cook until the potatoes are fork-tender but not falling apart, about 8 to 10 minutes.
Marinate in Vinegar - Drain the potatoes in a colander and transfer them to a large bowl. Add the vinegar and gently stir to combine. Let it sit and marinate for 20 minutes. The potatoes will still be warm.
Make the Dressing - In a medium bowl, whisk together the mayonnaise, relish, mustard, ¾ teaspoon salt, black pepper, and garlic powder.
Add the Mix-ins - To the large bowl, add the dressing, celery, onions, green onions, and chopped eggs. Season with salt and pepper to taste.
To Serve - Cover and refrigerate until chilled, about 1 hour before serving. Garnish with paprika and green onions.