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Cheesy Root Vegetable Gratin

Cheesy Root Vegetable Gratin: A Comforting Side Dish for Every Occasion

  • Author: Lyndy
  • Total Time: 1 hour 25 minutes
  • Yield: 6 servings 1x
  • Diet: Vegetarian

Description

This Cheesy Root Vegetable Gratin is a cozy, elegant side dish made with layers of potatoes, carrots, parsnips, and other root vegetables baked in a creamy, cheesy sauce. Perfect for Thanksgiving side dishes, Sunday dinners, or weeknight comfort food, it’s hearty, flavorful, and versatile enough to serve as a vegetarian main course.

Ingredients

Scale
  • 2 medium potatoes, peeled and thinly sliced
  • 2 parsnips, peeled and thinly sliced
  • 2 carrots, peeled and thinly sliced
  • 1 small sweet potato, peeled and thinly sliced
  • 1 small rutabaga or turnip, peeled and thinly sliced
  • 2 tablespoons butter
  • 2 cloves garlic, minced
  • 1 ½ cups heavy cream
  • 1 cup whole milk
  • 1 teaspoon fresh thyme leaves (or ½ teaspoon dried thyme)
  • Salt and black pepper, to taste
  • 1 cup shredded Gruyère cheese
  • ½ cup shredded Parmesan cheese
  • Optional: thinly sliced tomatoes for topping

Instructions

  1. Prep vegetables: Wash, peel, and thinly slice all root vegetables evenly.
  2. Make cream sauce: In a saucepan, melt butter over medium heat. Add garlic and sauté for 1 minute. Stir in cream, milk, thyme, salt, and pepper. Simmer gently for 3–4 minutes.
  3. Assemble: Preheat oven to 375°F (190°C). Lightly butter a baking dish. Layer vegetables in overlapping rows, alternating colors. Pour cream mixture evenly over the vegetables.
  4. Add cheese: Sprinkle Gruyère and Parmesan over the top. Cover with foil.
  5. Bake: Bake covered for 40 minutes, then uncover and bake 20 minutes more, until golden brown and bubbling.
  6. Rest & serve: Allow to rest for 10 minutes. Garnish with fresh thyme or parsley before serving.

Notes

  • Use a mandoline for even vegetable slices to ensure uniform cooking.
  • Simmer the cream sauce long enough to avoid watery gratin.
  • Add tomatoes or butternut squash for flavor variation.
  • Cover with foil until the last 20 minutes to prevent overbrowning.
  • Let gratin rest before serving so layers set properly.
  • Prep Time: 25 minutes
  • Cook Time: 60 minutes
  • Category: Side Dish, Vegetarian
  • Method: Baked
  • Cuisine: French, American

Nutrition

  • Serving Size: 1 portion
  • Calories: 320
  • Sugar: 6g
  • Sodium: 310mg
  • Fat: 20g
  • Saturated Fat: 12g
  • Unsaturated Fat: 7g
  • Trans Fat: 0g
  • Carbohydrates: 28g
  • Fiber: 4g
  • Protein: 10g
  • Cholesterol: 60mg

Keywords: root vegetable gratin, cheesy vegetable bake, thanksgiving side dishes, vegetable gratin recipe, vegetarian comfort food

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Find it online: https://lyndyskitchen.com/cheesy-root-vegetable-gratin/