Gluten Free Potato Dauphinoise

Ingredients

• 2 lbs russet potatoes, peeled and thinly sliced (about 1/8 inch thick)
• 2 cups heavy cream
• 1 cup whole milk
• 3 cloves garlic, minced
• 2 tsp salt
• 1 tsp black pepper
• 1/2 tsp freshly grated nutmeg (optional, but très fancy)
• 1 cup grated Gruyère cheese (or a gluten free alternative)
• 2 tbsp unsalted butter, for greasing