Ingredients
Equipment
Method
Step-by-Step Instructions
- Preheat your oven to 400°F (200°C) and grease a 3-quart baking dish with unsalted butter.
- Slice the sweet potatoes, parsnips, and beets into very thin rounds and place in separate bowls.
- Coat sweet potatoes and parsnips with 4 tablespoons of heavy cream, mix with ½ ounce of Parmesan and 1 teaspoon of thyme. For beets, blend with 2 tablespoons of cream, remaining Parmesan, salt, and pepper.
- Pour ¼ cup of heavy cream into the baking dish, sprinkle with ½ ounce of Parmesan, and add minced garlic. Layer sweet potato, parsnip, and beet slices, repeating until all are used.
- Sprinkle the top layer with salt, pepper, and remaining Parmesan cheese. Cover with aluminum foil and bake for 30 minutes.
- Remove the foil, top with shredded Gruyère cheese, and bake uncovered for an additional 18-20 minutes or until golden brown.
- Let the gratin rest for 10 minutes, garnish with fresh thyme, and serve.
Nutrition
Notes
This dish can be made ahead of time and refrigerated. If cooking from cold, increase baking time by an additional 5-7 minutes.
