Root Vegetable Gratin

Ingredients (12)

• 3 Russet potatoes, sliced thin
• 1 large sweet potato, sliced thin
• 1 large celery root, sliced thin
• 1 large rutabaga, sliced thin
• 2 turnips, sliced thin
• 6 ounces Gruyere cheese, grated
• 2 cups heavy cream
• 1/2 teaspoon ground nutmeg
• 2 cloves garlic, mashed
• 3-4 sprigs fresh thyme
• 1 tablespoons unsalted butter, for dish
• Salt and pepper