Side Dishes

Potato and Leek Gratin

  • Prep 20 mins
  • Total 50 mins
  • Medium
  • Serves 10

Each layer of potatoes in this dish is drizzled with a creamy leek sauce so that the potatoes get wonderfully crisp and tender and the cheese forms a melty, golden crust. Pair with the holiday ham or other main dish for a delightfully decadent meal.

Tip: Try using the Ninja XL Food Processor or a mandolin to slice the potatoes quickly and with the same exact thickness.


  • Contains Milk/Dairy

Tip: Allergy Advice

This dish contains the following allergens: Milk/Dairy

Cooking mode

Step-by-step instruction without your screen going to sleep

  • 2 1/2 cups whole milk
  • 1 1/2 pounds russet potatoes, peeled, and very thinly sliced
  • 2 cloves garlic, peeled, minced
  • 1 tablespoon unsalted butter
  • 1 large leek, trimmed, halved lengthwise, and sliced (about 2 cups)
  • 1 teaspoon kosher salt, divided
  • 1/2 cup gruyere cheese, shredded
  • 1/4 cup parmesan cheese, grated
  • 1/2 teaspoon ground black pepper


  • Medium Bowl
  • Colander
  • Aluminum Foil
  • Step 1

    Preheat oven to 375˚F.

  • Step 2

    Place the PossiblePan over medium-high heat. Add milk, potatoes, and garlic, stir to combine, and bring to a boil. Reduce heat and simmer 5 minutes or until potatoes are nearly fork tender. Drain in a colander over a bowl, reserving ½ cup milk mixture. Set potatoes and milk mixture aside and wipe pan clean.

  • Step 3

    Melt butter in pan over medium heat. Add leeks and cook for 8 minutes, or until softened. Remove pan from heat and add leek mixture to a medium bowl.

  • Step 4

    Arrange half of the potatoes in a single layer at the bottom of the pan and top evenly with half of the leek mixture. Sprinkle with ½ teaspoon salt and ¼ cup Gruyere cheese. Repeat with remaining potatoes, leeks, salt, and Gruyere. When finished, drizzle with reserved ½ cup milk mixture and top with Parmesan cheese.

  • Step 5

    Cover pan with foil and bake for 25 minutes. After 25 minutes, remove foil from the pan, set oven to broil, and broil for 5 minutes or until gratin is bubbly and golden brown.

  • Step 6

    When cooking is complete, sprinkle gratin with pepper, cut into 1 wedges, and serve.