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Potato-Leek Gratin

Photo: Jennifer Davick; Styling: Linda Hirst
Prep time 15 mins
Cook time 20 mins
Bake time 20 mins
Yield Makes 8 servings


  • 2 tablespoons butter
  • 2 leeks, sliced
  • 3 garlic cloves, minced
  • 1 tablespoon chopped fresh rosemary
  • 2 teaspoons sea salt
  • 1 teaspoon cracked black pepper
  • 2 pounds Yukon gold potatoes, very thinly sliced
  • 2 cups heavy cream
  • 1 cup whole milk
  • 1 cup (4 ounces) shredded Gruyère cheese
  • 1/2 cup (2 ounces) grated Parmesan cheese
  • Garnish: fresh rosemary leaves

How to Make It

  1. Preheat oven to 400°. Melt butter in a large, deep skillet or saucepan over medium-high heat. Add leeks and garlic; sauté 5 to 7 minutes or until tender. Stir in rosemary, sea salt, and pepper.

  2. Add potatoes, cream, and milk to leek mixture in pan, stirring gently to combine. Bring mixture to a boil, reduce heat, and simmer, uncovered, 10 to 15 minutes or until potatoes are barely tender. (Do not overcook. Potatoes will be pliable, but not fully cooked.)

  3. Spoon half of potato mixture into a lightly greased 2 1/2-quart baking dish. Sprinkle with 1/2 cup Gruyère cheese and 1/4 cup Parmesan. Top with remaining potato mixture; sprinkle with remaining cheeses. (May be covered and refrigerated overnight. Let come to room temperature before baking.)

  4. Bake 20 to 30 minutes or until potatoes are tender and top is golden brown. Garnish, if desired.