French Potato Gratin - Potato Glory

Ingredients

• 2½ lbs. Colomba potatoes, sliced into ½” thick slices
• 5 cups whole milk
• 2 garlic cloves (very lightly crushed to release their flavor)
• 1½ cups heavy cream
• 1½ cups crème fraiche or sour cream
• 1 teaspoon salt
• ¼ teaspoon ground black pepper Pinch of freshly grated nutmeg
• ⅔ cup grated Gruyère cheese
• 2 tablespoons butter, softened