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Cheesy Root Vegetable Gratin

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This Cheesy Root Vegetable Gratin is the ultimate holiday side dish! Layers of tender root vegetables baked in a creamy, cheesy sauce until golden and bubbly.

Ingredients

Scale

For the Crust:

  • 2 large sweet potatoes, peeled and thinly sliced
  • 2 large Yukon gold potatoes, peeled and thinly sliced
  • 1 large parsnip, peeled and thinly sliced
  • 1 large turnip, peeled and thinly sliced
  • 1 large rutabaga, peeled and thinly sliced
  • 1/4 cup unsalted butter
  • 1/4 cup all-purpose flour
  • 2 cups whole milk
  • 1 cup heavy cream
  • 2 cloves garlic, minced
  • 1 1/2 teaspoons fresh thyme leaves
  • 1/4 teaspoon freshly grated nutmeg
  • 1 1/2 cups Gruyère cheese, shredded
  • 1/2 cup Parmesan cheese, grated
  • salt and pepper to taste

Instructions

1. Prepare the Crust:

  1. Preheat oven to 375˚F. Lightly grease a 9″x13″ baking dish and set aside.
  2. Place sweet potatoes, Yukon gold potatoes, parsnip, turnip and rutabaga into a large bowl and set aside.
  3. Melt butter in a medium saucepan over medium heat. Whisk in flour and cook for 1 minute.
  4. Slowly whisk in milk and cream until no lumps remain. Stir in garlic, thyme and nutmeg. Continue to cook, while stirring, until sauce has thickened, about 3 to 4 minutes.
  5. Remove from heat and stir in 1 cup of Gruyère and all of the Parmesan cheese until smooth. Season with salt and pepper.
  6. Pour sauce over vegetables and toss together until all slices are coated.
  7. Arrange vegetable slices into the prepared baking dish, standing up on their sides, in rows until the dish is filled.
  8. Cover with foil and bake for 40 minutes. Remove foil, top with remaining 1/2 cup of Gruyère and continue to bake for another 25 to 30 minutes or until top is golden brown and sauce is bubbly.
  9. Remove from oven and allow gratin to rest for 10 minutes before serving. Garnish with more fresh thyme and serve.

Notes

Notes: You can use any combination of root vegetables for this recipe. Just keep the total weight of the vegetables about the same. To make slicing easier and more uniform, use a mandoline.

Find it online: https://www.delicetreats.com/cheesy-root-vegetable-gratin-6/