Making Creamy Scalloped Potatoes is a straightforward process. Follow these steps to create this delicious dish:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Baking Dish: Grease a 9×13-inch baking dish with butter.
3. Slice the Potatoes: Wash and peel the potatoes. Using a mandoline or a sharp knife, slice them into thin rounds (about 1/8-inch thick).
4. Sauté Onions: In a skillet over medium heat, melt 1 tablespoon of butter. Add the diced onions and sauté until they are soft and translucent, about 5 minutes.
5. Mix the Cream: In a large mixing bowl, combine the heavy cream, minced garlic, salt, black pepper, thyme, and nutmeg. Stir well to combine.
6. Layer the Potatoes: Start layering the sliced potatoes in the prepared baking dish. After a layer, pour a small amount of the cream mixture over the potatoes, followed by a sprinkle of both cheeses.
7. Continue Layering: Repeat the layering process until all potatoes, cream, and cheese are used up.
8. Dot with Butter: Top the final layer with the remaining cheese and dot with the remaining tablespoon of butter.
9. Bake: Cover the baking dish tightly with aluminum foil and bake in the preheated oven for 45 minutes.
10. Remove Foil and Brown: After 45 minutes, remove the foil and increase the oven temperature to 400°F (200°C). Bake for an additional 15–20 minutes, until the top is golden brown and bubbly.
11. Cool and Garnish: Allow the dish to cool for about 10 minutes before serving. Garnish with chopped parsley for added freshness.

This method isn’t just about following the steps; it’s about creating a comforting staple that everyone will love.