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Sweet Potato Gratin with Gruyere, Parmesan, and Fresh Thyme Recipe

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4.1 from 12 reviews

  • Author: Emma
  • Total Time: 1 hour 5 minutes
  • Yield: 10 servings
  • Diet: Vegetarian

Description

This Sweet Potato Gratin is a creamy, cheesy, and flavorful dish featuring thinly sliced sweet potatoes layered with gruyere and parmesan cheeses, fresh thyme, and seasoned with garlic and black pepper. Baked to golden perfection, it makes an irresistible side that combines the natural sweetness of sweet potatoes with savory, melted cheese, perfect for family dinners or holiday meals.

Ingredients

Sweet Potatoes

  • 5 medium sweet potatoes (about 2 lbs)

Cheese and Seasonings

  • 1 cup grated gruyere cheese
  • 2/3 cup grated parmesan cheese
  • 1.5 tablespoons fresh thyme (plus more for serving)
  • 1 teaspoon kosher salt
  • 1/2 teaspoon ground black pepper
  • 1/2 teaspoon garlic powder

Other

  • 2 tablespoons butter (melted)

Instructions

  1. Prepare the Baking Dish: Preheat your oven to 425 °F. Grease a 3-quart gratin dish or 9×13 baking dish with butter or spray it with oil to prevent sticking.
  2. Slice the Sweet Potatoes: Thoroughly wash and dry the sweet potatoes. Peel them using a vegetable peeler and discard the peels. Using a mandolin slicer, slice the sweet potatoes into thin 1/8 inch thick slices.
  3. Season the Potatoes: Place all the sliced sweet potatoes in a large mixing bowl. Toss them with the melted butter, fresh thyme, kosher salt, ground black pepper, and garlic powder until all slices are evenly coated.
  4. Layer the Gratin: Arrange one-third of the seasoned potato slices in an overlapping layer at the bottom of the prepared baking dish. Evenly sprinkle one-third of the mixed shredded gruyere and parmesan cheese over the layer. Press down gently to make the potatoes snug. Repeat this layering process two more times, ending with a cheese layer on top.
  5. Bake Covered: Cover the dish tightly with aluminum foil. Spray the side of the foil that will contact the gratin with olive oil spray to prevent sticking. Place the gratin on the middle oven rack and bake for 30 minutes.
  6. Bake Until Golden: Remove the foil carefully. Move the gratin to the top rack of the oven and bake uncovered for an additional 10 to 15 minutes, or until the top is golden brown and the dish is bubbly.
  7. Cool and Serve: Remove the gratin from the oven. Let it cool for a few minutes to set before serving. Garnish with additional fresh thyme if desired and enjoy!

Notes

  • Using a mandolin slicer ensures evenly thin slices for quick and even cooking.
  • Spraying the foil that covers the gratin prevents the cheese from sticking to it.
  • You can substitute gruyere with Swiss cheese if not available.
  • For a richer flavor, allow the gratin to rest for 10 minutes before serving to let flavors meld.
  • This dish reheats well – cover with foil and bake at 350 °F for 15 minutes.
  • Prep Time: 20 minutes
  • Cook Time: 45 minutes
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American

Find it online: https://myeasyplate.com/sweet-potato-gratin-with-gruyere-parmesan-and-fresh-thyme-recipe/