Scalloped Potatoes and Ham

01Method

1. 1

   Preheat the oven to 350°F (175°C) and lightly coat a 9x13-inch baking dish with cooking spray.

2. 2

   Fill a large pot with water and bring to a boil. Add the potato slices and parboil until just barely tender, 5–10 minutes. Drain in a colander, rinse under cold water, and set aside.

3. 3

   In a large skillet over medium heat, melt the butter. Add the onion and sauté, stirring frequently, until soft, about 5 minutes. Mix in the flour, Dijon mustard, salt, and pepper and cook for 1 minute. Slowly pour in the milk while stirring continuously until the sauce thickens, about 5 minutes. Add the Cheddar cheese and stir until fully melted.

4. 4

   Arrange half the potato slices in an even layer in the prepared dish. Scatter half the ham over the top, then pour over half the cheese sauce. Repeat with the remaining potatoes, ham, and sauce.

5. 5

   Bake in the preheated oven until the sauce is bubbling and the top is golden brown, about 1 hour.