Layers of potatoes parsnips celery root sweet potatoes soak garlicky cream gruyere cheese, bake tender crusty American side dream. Chef John style 350°F melds roots rich 1 hour 15 minutes no stir mess. Holiday roast turkey star, impressive depth feeds 8 elegant simple.

Chef Johns Root Vegetable Gratin Recipe
Potatoes parsnips celery root sweet potatoes cream cheese baked crusty.
Ingredients
Equipment
Method
- Peel potatoes parsnips celery root sweet potatoes. Mandoline 1/8-inch thin rounds even. Soak cold water 10 minutes rinse starch dry stack piles.
- Rub garlic halves 3-quart baking dish coat flavor. Layer potatoes parsnips celery root sweet potatoes even single. Pour ½ cup cream ½ cup gruyere sprinkle salt nutmeg pinch.
- Repeat root cream cheese layers 3 times press spoon down. Top thick cream cheese crust. Foil tent 350°F 60 minutes knife slides center tender.
- Foil off bake 15 minutes bubbly. Broil 2 minutes golden watch close. Rest 15 minutes slices hold.
Notes
1/8-inch thin uniform cooks even soaks cream. Celery root thick peel. Press layers even soak. Foil first steams tender.

