Follow these steps to create delicious Scalloped Potatoes:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Baking Dish: Grease a 9×13-inch baking dish with butter.
3. Slice Potatoes: Peel and thinly slice the potatoes using a mandoline or sharp knife. Aim for about 1/8-inch thickness.
4. Make Cream Mixture: In a bowl, combine the heavy cream, minced garlic, salt, pepper, and nutmeg. Stir until well mixed.
5. Layer Potatoes: Place a layer of potato slices at the bottom of the baking dish. Pour a portion of the cream mixture over the layer.
6. Add Cheese: Sprinkle a layer of cheddar cheese and Parmesan cheese on top of the cream.
7. Repeat Layers: Continue layering the potatoes, cream, and cheeses until all ingredients are used, finishing with a layer of cheese on top.
8. Dot with Butter: Cut the remaining butter into small pieces and dot it over the top layer of cheese.
9. Cover and Bake: Cover the dish with aluminum foil and bake for 30 minutes.
10. Uncover and Brown: Remove the foil and bake for an additional 15 minutes, or until the top is golden brown and bubbly.
11. Cool and Garnish: Let the dish cool for about 10 minutes before serving. Garnish with fresh parsley if desired.

These steps will guide you to create a stunning dish filled with creamy layers of comfort!