Three Potato Gratin | Emerils.com

Ingredients

• 1 tablespoon unsalted butter
• 2 heads of garlic, split in half
• 1 quart of cream
• 1 pound peeled white potatoes, 1/4-inch slices
• 1 pound peeled sweet potatoes, 1/4-inch slices
• 1 pound red potatoes, 1/4-inch slices
• 2 cups grated Parmigiano-Reggiano cheese, plus 2 tablespoons for garnish
• Salt and white pepper
• Essence
• 2 tablespoons chopped chives