Test Kitchen Tips
When slicing the potatoes, make sure to slice them on the thin side so they bake quicker.
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1Peel and slice the potatoes. Then set aside.
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2
Shred the cheese and cube the ham.
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3Sauté the onion in a little butter; then set aside.
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4Make a roux in a medium saucepan over medium heat. (Or just use the sauté pan.) Melt the 3 tablespoons of butter, then sprinkle in the flour.
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5Whisk in the milk, stirring constantly, until the white sauce starts to thicken. Salt & pepper, to taste. Remove from heat and set aside.
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6To assemble, butter a 3 qt. (or up to a 13 x 9″) baking dish. Spread 1/3 of the white sauce over the bottom of the dish.
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7Layer 1/2 of the potatoes, 1/2 of the onions,1/2 of the ham, and 1/2 of the cheese.
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8Spoon over ½ of the remaining white sauce.
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9Repeat layers of the rest of the potatoes, onion, white sauce, and finish with ham and cheese on top.
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10Drizzle additional milk over the top of the prepared casserole. If the white sauce was barely thickened, just add ½ cup of milk. If the white sauce got more thickened while making it, add a little more milk, but no more than 1 cup or the casserole will be soupy. But if you like it that way… =^..^=
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11Bake uncovered at 350˚ F for about 45 minutes or until the potatoes are cooked through and the cheese is bubbling.
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12Serve immediately and stand back to avoid the stampede.