Austrian-Style Potato Salad (Erdäpfelsalat)

Name: Austrian-Style Potato Salad (Erdäpfelsalat)
Cook time: 1 h 30 min
Total time: 1 h 30 min
Cuisine: European
Ingredients: 2 pounds (1 kg) Yukon Gold potatoes, peeled, quartered, and cut into 1/2-inch-thick slices, peels reserved separately; 3 tablespoons (45 ml) white wine vinegar, divided, plus more to taste; 1/4 cup (60 ml) extra-virgin olive oil; 1 tablespoon (15 ml) Dijon mustard; 3/4 cup (90 g) minced red onion, from about 1 small onion; 2 tablespoons minced fresh chives; 1/2 cup (120 ml) homemade or store-bought low-sodium chicken stock; 2 teaspoons (about 10 g) sugar; Kosher salt; Freshly ground white or black pepper