Preheat the oven to 375 degrees F. Lightly butter a shallow 2-quart baking dish.
Line a baking sheet with paper towels. Peel the celery root, then quarter and slice 1/4 inch thick. Heat 2 tablespoons olive oil in a large skillet over medium heat. Working in batches, add the celery root to the skillet in a single layer and cook, turning, until browned, about 10 minutes per batch. Remove with a slotted spoon and drain on the paper towels.
Meanwhile, peel the potatoes and slice 1/4 inch thick. Add another 2 tablespoons olive oil to the skillet. Working in batches, add the potatoes in a single layer and cook, turning, until browned and tender, about 10 minutes per batch. Remove with a slotted spoon and drain on the paper towels with the celery root.
Peel the pear, core and slice 1/4 inch thick. Add the remaining 2 tablespoons olive oil to the skillet. Add the pear in a single layer and cook, turning, until browned, about 10 minutes; transfer to the paper towels. Lightly season the celery root, potatoes and pear with salt and pepper.
Heat the cream and garlic in a saucepan over medium-high heat until just simmering; remove from the heat. Combine the gruyere, parmesan, thyme and 1 teaspoon each salt and pepper in a bowl.
Spread the celery root in the prepared baking dish. Sprinkle one-third of the cheese mixture on top. Remove the garlic from the cream, then pour one-quarter of the cream over the cheese. Layer the potatoes on top, then sprinkle with another one-third of the cheese mixture; pour another one-quarter of the cream on top. Top with the pear slices and sprinkle with the remaining cheese mixture. Pour the remaining cream over everything.
Cover the dish with aluminum foil and bake 30 minutes, then uncover and bake until the gratin is bubbly and browned, 5 to 10 more minutes. Let cool 15 minutes before serving.
Photograph by Yunhee Kim

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	424.25 Kcal (1776 kJ)
Calories from fat	253.19 Kcal
		% Daily Value*
Total Fat	28.13g	43%
Cholesterol	45.97mg	15%
Sodium	502.11mg	21%
Potassium	474.68mg	10%
Total Carbs	29.53g	10%
Sugars	8.65g	35%
Dietary Fiber	4.27g	17%
Protein	12.17g	24%
Vitamin C	19.4mg	32%
Iron	77.2mg	429%
Calcium	294.6mg	29%

Amount Per 100 g
Calories	173.32 Kcal (726 kJ)
Calories from fat	103.44 Kcal
		% Daily Value*
Total Fat	11.49g	43%
Cholesterol	18.78mg	15%
Sodium	205.13mg	21%
Potassium	193.92mg	10%
Total Carbs	12.06g	10%
Sugars	3.54g	35%
Dietary Fiber	1.75g	17%
Protein	4.97g	24%
Vitamin C	7.9mg	32%
Iron	31.6mg	429%
Calcium	120.4mg	29%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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