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### Instructions
1. **Preheat your oven** to 375°F (190°C) and grease a 9×13-inch baking dish.
2. **Make the sauce**: In a saucepan, melt butter over medium heat. Stir in flour and cook for 1–2 minutes to form a roux. Slowly whisk in the milk, stirring constantly until the mixture thickens—about 5 minutes. Add salt, pepper, and garlic or onion if using. Stir in cheese at this stage if you want a cheesy twist.
3. **Layer the potatoes**: Arrange half the sliced potatoes in the baking dish. Pour half the sauce over the top. Repeat with remaining potatoes and sauce.
4. **Bake uncovered** for 50–60 minutes, or until the potatoes are tender and the top is golden and bubbling.
5. **Let rest** for 10 minutes before serving to allow the sauce to thicken.
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### Tips for Success
– Use a **mandoline slicer** for even, thin potato slices—this ensures uniform cooking.
– Don’t skip the **resting time**—it allows the dish to set and makes serving cleaner.
– Add a sprinkle of **grated Parmesan or breadcrumbs** on top before baking for extra crunch.
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### Final Thoughts
Scalloped potatoes are more than just a side dish—they’re a **warm, creamy reminder of home and tradition**. Whether you’re making them for a festive dinner or a simple weeknight meal, they bring a sense of comfort and nostalgia to the table. Once you master this easy recipe, you’ll find yourself making it again and again—because nothing beats a dish that’s simple, satisfying, and always a hit.
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Would you like a dairy-free or make-ahead version of this recipe as well?
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