Chef John's Root Vegetable Gratin

Chef John's Root Vegetable Gratin

If you've ever had a craving for a dish with turnips, rutabagas, celery root, potatoes, and parsnips all-in-one, this cheesy and creamy vegetable gratin recipe is just what you're after.

Preparation Time
20 mins
Cooking Time
1 hr 20 mins
Total Time
1 hr 40 mins
Calories
309 Calories

Recipe Instructions

Step 1
Preheat the oven to 375 degrees F (190 degrees C).
Step 2
Bring a large pot of generously salted water to a boil. Add the vegetables, and cook uncovered for 3 minutes. Drain in a colander, then immediately immerse in ice water for several minutes until cold to stop the cooking process. Once the vegetables are cold, drain well, and set aside.
Step 3
Cook garlic and butter in a large skillet over medium heat until garlic starts sizzling, about 3 minutes.
Step 4
Stir in chicken broth, heavy cream, thyme, nutmeg, and cayenne pepper; cook until mixture begins to simmer, about 5 minutes.
Step 5
Coat a 9x13-inch baking dish with olive oil and spread vegetables evenly over the oil.
Step 6
Pour broth and cream mixture over vegetables and top with half of the grated Parmigiano-Reggiano cheese.
Step 7
Cover baking dish loosely with aluminum foil, place on a baking sheet, and bake in the preheated oven for 40 minutes.
Step 8
Remove baking dish from the oven and top with remaining Parmigiano-Reggiano. Bake uncovered until vegetables are browned, bubbling, and tender, about an additional 30 minutes.
Step 9
Remove from the oven and let rest for 20 minutes.

Ingredients

  • 2 tablespoons butter
  • 1 pinch ground nutmeg
  • 1 cup heavy cream
  • 2 teaspoons olive oil
  • 3 cloves garlic, minced
  • 1 tablespoon chopped fresh thyme
  • 1 pinch cayenne pepper
  • Salt, to taste
  • 2 Yukon Gold potatoes, scrubbed and sliced 1/8-inch thick with peel
  • 1 turnip, peeled and sliced 1/8-inch thick
  • 1 rutabaga, peeled and sliced 1/8-inch thick
  • 1 small celery root, peeled and sliced 1/8-inch thick
  • 1 parsnip, peeled and sliced 1/8-inch thick
  • 1.25 cups chicken broth
  • 0.25 cup finely grated Parmigiano-Reggiano cheese, divided

Categories

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