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1. Preheat your oven to 350°F (175°C). Grease a 2-quart casserole dish.
2. Layer half of the sliced potatoes in the dish, followed by half of the diced ham and chopped onions. Repeat with the remaining potatoes, ham, and onions.
3. In a saucepan, melt the butter over medium heat. Stir in the flour and cook for about a minute.
4. Gradually whisk in the milk, bringing the mixture to a simmer. Cook until it thickens, stirring constantly.
5. Season the sauce with salt, pepper, and paprika. Remove the saucepan from heat and stir in the shredded cheddar cheese until melted and smooth.
6. Pour the cheese sauce evenly over the layered potatoes, ham, and onions in the casserole dish.
7. Cover the dish with aluminum foil and bake for 60 minutes.
8. Remove the foil, sprinkle the grated Parmesan cheese on top, and bake for an additional 20-30 minutes until the top is golden brown and bubbly.
9. Allow the dish to cool slightly before serving.
**Variations & Tips:**
– Add a pinch of cayenne pepper or a splash of hot sauce to the cheese sauce for a spicy kick.
– For a vegetarian version, replace the ham with sautéed mushrooms and spinach.
– This dish makes excellent leftovers and reheats well.
– Experiment with different types of cheese for a unique flavor.
– Use a mandoline slicer to ensure the potato slices are evenly thin.
Enjoy making this delightful Ham and Potato Au Gratin, and let it fill your home with warmth and your meal with joy!
