Eggy Potato Salad with Pickles

INGREDIENTS

• 2 tablespoons chopped flat-leaf parsley
• 5 large hard-boiled egg yolks
• 1/4 teaspoon freshly ground black pepper plus more
• 2 tablespoons chopped red onion
• 8-10 sweet-pickle chips
• 1 1/4 teaspoons kosher salt plus more
• 2 3/4 pounds medium red-skinned potatoes, peeled (about 8)
• Paprika
• 1/2 cup mayonnaise
• 1 teaspoon sugar
• 1 1/2 tablespoons Dijon mustard
• 1/4 cup sweet pickle juice from jar