Potato & Celery Root Gratin with Leeks |
|
 |
Prep Time: 0 Minutes Cook Time: 0 Minutes |
Ready In: 0 Minutes Servings: 8 |
|
Celery root, also known as celeriac, has a knobby exterior that is best peeled (carefully!) with a paring knife. Ingredients:
3 cups heavy cream |
2 garlic cloves, peeled |
1 sprig thyme plus 3 teaspoons fresh thyme leaves, divided |
2 tablespoons (1/4 stick) unsalted butter, divided |
3 leeks, white and pale-green parts only, halved lengthwise, thinly sliced crosswise |
kosher salt |
2 pounds russet potatoes, peeled, very thinly sliced crosswise (1/8 thick) |
1 pound celery root, peeled, very thinly sliced crosswise (1/8 thick) |
2 cups grated gruyère |
freshly ground black pepper |
Directions:
1. Preheat oven to 350°F. Heat cream, garlic, and thyme sprig in a medium saucepan just until bubbles begin to form around edge of pan. Remove from heat; set aside to steep.
2. Melt 1 tablespoon butter in a medium skillet over medium heat. Add leeks; season with salt and cook, stirring often, until tender (do not brown), 10-12 minutes. Transfer to a small bowl and set aside.
3. Butter a 3-quart gratin dish with remaining 1 tablespoon butter. Layer 1/3 of potato slices and 1/3 of celery root slices evenly over bottom of baking dish. Cover with 1/3 of leeks, then 1/3 of Gruyère. Sprinkle with salt, pepper, and 1 teaspoon thyme leaves. Repeat layers twice more. Strain cream mixture into a medium pitcher and pour over vegetables.
4. Set gratin dish on a large rimmed baking sheet and cover tightly with foil. Bake for 1 hour. Carefully remove foil; continue baking until top is golden brown and sauce is bubbling, 25-30 minutes. DO AHEAD: Can be made 2 hours ahead. Let stand at room temperature. Tent with foil and rewarm in a 300° oven until hot, about 20 minutes.
|
|