Potato & Leek Gratin Recipe - (4.4/5)

Ingredients

• 2 1/2 cups whole milk
• 1 1/2 pounds Yukon Gold potatoes, peeled and very thinly sliced
• 2 garlic cloves, smashed
• 1 tablespoon unsalted butter
• 1 large leek, trimmed, halved lengthwise, and sliced (about 2 cups)
• 1 teaspoon kosher salt, divided
• 2 ounces Gruyère cheese, shredded (about 1/2 cup)
• 1 ounce Parmesan cheese, grated (about 1/4 cup)
• 1/2 teaspoon freshly ground black pepper