Gratin: Potato Leek | Recipe Cloud App

Ingredients

• 3 pounds Yukon gold potatoes, peeled
• 1 large leek
• 1 tablespoon butter
• 1 ¼ teaspoons kosher salt, divided
• 1 cup shredded Gruyère cheese, about 4 ounces (see Notes below)
• 1 cup whole milk
• ¼ cup grated Parmesan cheese, about 1 ounce (see Notes below)
• ½ teaspoon freshly ground black pepper