This recipe makes a delicious holiday side dish and uses milk instead of heavy cream to lighten it up. Leeks in this dish give a sweet and mild onion flavor that pairs well with potatoes.
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
Preheat oven to 375°F. Combine milk, potatoes and garlic in a large saucepan; bring to a boil. Reduce heat and simmer 5 minutes or until potatoes are almost tender. Drain in a colander over a bowl, reserving 1/2 cup milk mixture.
Melt butter in a 10-inch cast-iron skillet over medium heat. Add leek; cook 8 minutes or until tender, stirring occasionally. Remove pan from heat; place leek mixture in a bowl. Arrange half of potato slices in a single layer in bottom of skillet or a gratin dish; top evenly with half of leek mixture. Sprinkle with 1/2 teaspoon salt and 1/4 cup Gruyère cheese.
Repeat layers with remaining half of potatoes, remaining half of leek mixture, remaining 1/2 teaspoon salt, and remaining 1/4 cup Gruyère. Drizzle with reserved 1/2 cup milk mixture; sprinkle with Parmesan.
Cover pan with foil; bake at 375°F for 25 minutes or until cheese melts. Remove foil from pan. Turn on broiler (do not remove pan from oven). Broil 5 minutes or until bubbly and golden brown. Remove pan from oven, and sprinkle with pepper; cool. Cut into 10 wedges.
Nutrition Information per serving:
Calories 134; Fat 5.8g; Satfat 3.4g; Monofat 1.6g; Polyfat 0.3g; Protein 6g; Carbohydrate 16g; Fiber 2g; Cholesterol 18mg; Iron 1mg; Sodium 312mg; Calcium 157mg; Sugars 4g
Printable recipe available at: https://www.cookinglight.com/recipes/potato-leek-gratin