01 - Place potatoes in a large pot, cover with cold water, add 1 tablespoon salt, and bring to a boil. Reduce heat and simmer for 10 to 12 minutes until potatoes are fork-tender. Drain and allow potatoes to cool slightly.
02 - In a large skillet over medium heat, cook chopped beef bacon until crispy. Transfer bacon to a paper towel-lined plate to remove excess fat.
03 - In a large mixing bowl, combine sour cream, mayonnaise, Dijon mustard, and black pepper. Whisk until the mixture is smooth and thoroughly blended.
04 - Add the slightly warm, drained potatoes into the bowl with the dressing. Gently fold potatoes to ensure they are evenly coated.
05 - Add diced celery, sliced green onions, shredded cheddar cheese, chopped parsley, and most of the crispy beef bacon—reserve some bacon and green onions for garnish. Gently mix to distribute all ingredients evenly.
06 - Adjust seasoning with additional salt and pepper as needed, tasting for balance.
07 - Transfer the potato salad to a serving platter or bowl. Garnish the top with reserved green onions, beef bacon, and extra parsley.
08 - Offer the potato salad warm, at room temperature, or chilled according to preference.