Creating scalloped potatoes from scratch is a rewarding experience, and it’s easier than you might think. Follow these steps to make a dish that’s both delicious and comforting:

1. Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with butter.
2. In a medium saucepan, combine the heavy cream, milk, and minced garlic. Season with salt and pepper. Bring the mixture to a gentle simmer over medium heat, stirring occasionally.
3. Arrange half of the sliced potatoes in the prepared baking dish. Pour half of the cream mixture over the potatoes, ensuring they are evenly coated.
4. Sprinkle half of the Gruyère cheese over the potatoes, followed by half of the Parmesan cheese and half of the thyme.
5. Repeat the layers with the remaining potatoes, cream mixture, Gruyère, Parmesan, and thyme.
6. Dot the top with small pieces of the remaining butter.
7. Cover the dish with foil and bake for 30 minutes. Remove the foil and bake for an additional 25-30 minutes, or until the potatoes are tender and the top is golden and bubbly.
8. Let the dish cool for a few minutes before serving, allowing the flavors to meld together beautifully.

Just like in my family kitchen, patience is key here. Letting the dish rest for a bit after baking enhances the overall flavor.