• 1½ cups apple cider vinegar
• 2 cups sugar
• ¼ cup water
• ½ cup mustard seeds
• 4 lbs. red potatoes, quartered, cooked and cooled
• 2/3 cup sour cream
• 2/3 cup mayonnaise
• 1/3 cup champagne vinegar
• 1/3 cup Dijon mustard
• 1/3 cup whole grain mustard
• 1/3 cup honey
• 1/3 cup olive oil
• 1 Tbsp. salt, divided
• 1½ cups diced celery
• 1 cup diced sweet onion
• ½ cup chopped flat leaf parsley
• ¼ cup chopped fresh dill
• Celery leaves