Bring potatoes to a boil; cook for 8 to 15 minutes or until they’re tender enough to bite through easily. Drain potatoes and spread them on a baking sheet in a single layer to cool. Add pepper, parsley, cayenne pepper, and sea salt. When potatoes are no longer steaming, transfer them to the refrigerator to chill.
Meanwhile, combine in a large bowl mayo, Miracle Whip®, mustard, and horseradish. Stir well before adding green onions, radishes, bacon, chives and dill; stir once again. Add potatoes and gently stir to coat. Cover and transfer to the refrigerator for 2 hours or until ready to serve.