01 - Place potatoes in a large pot and cover with cold water. Add 1 tablespoon salt. Bring to a boil, then reduce heat and simmer for 10 to 12 minutes or until potatoes are fork-tender. Drain thoroughly and allow to cool slightly.
02 - While potatoes cook, sauté the chopped beef bacon in a large skillet over medium heat until crisp. Transfer to a plate lined with paper towels to drain.
03 - In a large mixing bowl, whisk together sour cream, mayonnaise, Dijon mustard, and black pepper until smooth.
04 - Gently fold the warm, drained potatoes into the dressing until thoroughly coated.
05 - Add celery, green onions, cheddar cheese, parsley, and most of the cooked beef bacon, reserving a portion for garnish. Mix gently until all ingredients are well combined.
06 - Taste and adjust seasoning with additional salt and pepper as needed.
07 - Transfer potato salad to a large serving bowl or platter. Top with reserved beef bacon, the remaining green onions, and extra parsley. Serve warm, at room temperature, or chilled as preferred.