Patate Prezzemolate (Italian Potato Salad) Recipe

Ingredients

• 25 ounces Yukon Gold potatoes
• 1 tablespoon rock salt
• 4 tablespoons extra-virgin olive oil, divided
• 1 tablespoon white wine vinegar
• 2 cloves garlic, peeled and slightly crushed
• 2 green onions (white part only), chopped
• 0.5 cup very finely chopped flat-leaf parsley
• salt and freshly ground black pepper to taste
• 1 teaspoon red pepper flakes