Follow these step-by-step instructions to create your Southern Potato Salad:

1. Prepare the Potatoes: Wash and peel the potatoes, if desired. Cut them into uniform pieces (about 1-inch cubes) to ensure even cooking.

2. Boil the Potatoes: Place the cubed potatoes in a large pot and fill it with water. Add a pinch of salt and bring to a boil. Cook for 15-20 minutes or until tender but not mushy. Drain and set aside to cool.

3. Make the Dressing: In a large mixing bowl, combine the mayonnaise, sour cream, Dijon mustard, apple cider vinegar, sugar, salt, and black pepper. Stir until well mixed and creamy.

4. Combine Ingredients: Once the potatoes have cooled, gently fold them into the dressing mixture, being careful not to mash them.

5. Add Vegetables and Eggs: Add the diced celery, chopped red onion, dill pickle relish, and chopped hard-boiled eggs, if using. Mix gently until all ingredients are well combined.

6. Chill the Salad: Cover the bowl with plastic wrap and refrigerate for at least 30 minutes to let the flavors meld together.

7. Taste and Adjust: Before serving, taste the salad and adjust seasonings if needed. You can add more salt, pepper, or even a bit more vinegar for extra tang.

8. Garnish and Serve: Garnish with fresh dill or parsley if desired. Serve chilled and enjoy!

These straightforward steps ensure your Southern Potato Salad turns out creamy and delicious every time.