Roasted Root Vegetable & Gruyere Gratin

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Roasted Root Vegetable & Gruyere Gratin

Roasted Root Vegetable & Gruyere Gratin

Created for the 3 1/10 qt. Au Gratin Dish
Serves: 8


  • 1 baguette, cubed
  • 1 tablespoon olive oil
  • 1 clove garlic, crushed
  • 1 tablespoon unsalted butter
  • 1 small sweet onion, chopped
  • 5 large parsnips, peeled and sliced 1/8-inch thick
  • 2 pounds carrots, peeled and sliced 1/8-inch thick
  • 5 medium or large beets, peeled and sliced 1/8-inch thick
  • 4 tablespoons all-purpose flour
  • Salt
  • Pepper
  • 2 cups Gruyere, grated
  • 1 1/2 cups heavy cream
  • Bunch of rosemary


Preheat oven to 375 F.

In a food processor, combine baguette, olive oil and garlic. Pulse until it resembles medium-size meal. You should still have some texture and larger pieces of bread. Set aside.

In a small saute pan, heat butter and add onion, cooking until translucent.

In a large mixing bowl, combine sliced root vegetables with sauteed onion and fold to combine.

Butter the gratin dish. Place one third of the vegetables in an even layer on the bottom of the dish. Sprinkle 2 tablespoons of flour evenly over the top, and season with salt and pepper. Top with one third of the breadcrumbs and one third of the cheese. Repeat twice to use up all ingredients, omitting flour on the top layer.

Pour cream over the top. Make sure that only a little cream is visible when pressing the vegetables down flat.

Cover with foil and bake 30 minutes. Remove cover and bake another 30 minutes, or until cheese is bubbly and vegetables are tender. Let stand 10 to 15 minutes before serving. Garnish with fresh rosemary.

Cook’s Notes:

1) The amount of liquid in a gratin is very important. Too little will make a dry gratin, and too much will make it soupy. Pour in just enough cream so that you can see it peeking through the sides of the vegetables when you press down on top of them.

2) Use a mandoline to slice your vegetables. This ensures they are all the same size, and will all cook in the same amount of time.
Created For
Main Ingredient
Cooking Time
Under 2 hrs.
Serving Size
6 - 8