Instructions:
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Preheat Oven:
Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish with butter or non-stick spray. -
Make the Cream Sauce:
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In a medium saucepan, melt the butter over medium heat.
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Whisk in the flour and cook for 1 minute until bubbly (this forms a roux).
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Gradually whisk in the milk until smooth and thickened, about 3–5 minutes.
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Stir in cheese, garlic powder, onion powder, salt, and pepper. Remove from heat once cheese melts.
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Assemble the Dish:
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Layer half of the sliced potatoes in the prepared dish.
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Top with half of the diced ham.
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Pour half of the cheese sauce over the top.
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Repeat with the remaining potatoes, ham, and sauce.
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Sprinkle extra cheese on top if desired.
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Bake:
Cover with foil and bake for 40 minutes. Remove foil and bake another 20–25 minutes, until the top is golden and the potatoes are tender. -
Serve:
Let rest for 10 minutes before serving. Garnish with parsley if desired.
Tips:
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For a richer flavor, add ½ cup grated Parmesan or 1 minced garlic clove to the sauce.
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You can prep it ahead — assemble the casserole, refrigerate, then bake before serving.
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Great for using holiday ham leftovers.
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