Leek Soup with Shoestring Potatoes and Fried Herbs Recipe - (4.4/5)

Ingredients

• 1/2 cup (1 stick) unsalted butter
• 6 large leeks, white and pale-green parts only, halved lengthwise, thinly sliced crosswise
• 1 small onion, thinly sliced
• 5 garlic cloves, thinly sliced
• Kosher salt, to taste
• 2 cups whole milk, divided
• 1 cup heavy cream, divided
• 1 cup plain whole-milk yogurt, divided
• Freshly ground black pepper
• 1 russet potato, peeled, cut into thin matchsticks
• 4 cups vegetable oil (for frying)
• 1/4 cup fresh flat-leaf parsley leaves
• 1 sprig rosemary
• Flaky sea salt (such as Maldon)