Comforting Cheesy Ham and Potato Casserole Step-by-step instructions

Before you start

Before beginning the assembly, ensure the potatoes are scrubbed clean and peeled if desired. Use a sharp knife or a mandoline to slice the potatoes into consistent 1/4 inch rounds, as uniform sizing is the secret to even cooking.

Have all your ingredients measured out and within reach on the counter. Preheat your oven early to ensure it reaches the target temperature, and prepare your 9x13 inch baking dish with a light coating of oil or butter to prevent any sticking during the baking process.

Instructions

Preparing the potato base

1. 1Prepare the Base
   Preheat the oven to 375°F (190°C). Grease a 9x13 inch glass baking dish with butter or cooking spray. In a large bowl, prepare the sliced potatoes for layering.
   Look for Potatoes are sliced uniformly.
   Tip Slice the potatoes uniformly to ensure they cook through at the same rate.

At the end of this phase, the potato slices should be uniformly cut and ready for the dish. The oven should be fully preheated to the correct temperature, and the baking dish should be greased and ready for layering. Check that your work area is clean and all ingredients are organized so the assembly process can move efficiently without delay.

Layering the ingredients

2. 2Assemble the Casserole
   Arrange half of the potato slices in the prepared dish. Scatter half of the diced ham and half of the shredded cheddar over the potatoes. Repeat the layers with the remaining potatoes, ham, and cheese.
   Look for Ingredients are layered evenly.
   Tip Press down gently on the layers to help everything distribute.

Once you have finished layering, the dish should look orderly, with the ingredients evenly distributed across the surface. Check that the cheese is spread evenly over the top layer, as this will form the crust during the final stage of baking. The casserole is now ready for the oven.

Baking to golden perfection

3. 3Bake and Serve
   Cover the dish with foil and bake for 30 minutes. Remove the foil and continue baking for an additional 15 minutes, or until the potatoes are tender when pierced with a knife and the cheese is melted and golden. Let the casserole rest for 5 minutes before serving.
   Look for Cheese is bubbly and golden.
   Tip Use a fork to check the center for tenderness.

When the baking time is complete, the casserole should smell fragrant and savory. The cheese topping will have transformed into a golden, bubbly layer, and the potatoes inside should be soft and tender.

Use a knife to test the center of the dish; it should slide through the potatoes effortlessly. Let the dish rest for a few minutes so the flavors can meld.

Common mistakes

A common mistake is slicing the potatoes too thick, which prevents them from cooking through in the allotted time, leaving the center of the casserole crunchy. Conversely, cutting them too thin can cause them to disintegrate into a mash.

Another error is failing to layer the ingredients evenly; ensure you distribute the ham and cheese across the surface. Finally, avoid rushing the rest period, as the dish needs a few minutes to settle after it comes out of the oven.

How to tell it’s done

The casserole is done when the potatoes are completely tender and offer no resistance when pierced with a fork or knife. The cheese on top should be bubbling vigorously and have developed a deep golden-brown color in spots.

If the cheese is melting but the potatoes are still firm in the center, cover the dish with foil again and continue baking for another few minutes until the desired tenderness is reached.