Classic Scalloped Potatoes

🧾 Ingredients:

• 4 large potatoes (thinly sliced)
• 2 tablespoons butter
• 2 tablespoons flour
• 2 cups milk
• 2  garlic cloves (minced)
• Salt & black pepper
• 1 small onion (thinly sliced, optional)

👨‍🍳 Instructions:

1. Preheat oven to 180°C (350°F).
2. In a saucepan, melt butter over medium heat.
3. Add flour and whisk for 1 minute to form a roux.
4. Gradually add milk while whisking until smooth and thickened.
5. Stir in garlic, salt, and pepper.
6. Layer half of the potatoes in a greased baking dish (add onions if using).
7. Pour half of the sauce