Creamy Ham and Cheese Lasagna with a Golden Broiled Crust Step-by-step instructions

Before you start

Before starting the assembly, organize all ingredients and equipment on your workspace. Ensure the lasagna sheets are cooked, drained, and cooled slightly so they are easy to handle without tearing. Dice the ham into uniform half-inch cubes to ensure even distribution.

Measure out the white cheese sauce and shred the cheese if using a block. Preheating the oven to 375°F (190°C) is essential so that the lasagna begins cooking immediately upon entering the oven, promoting even heat distribution throughout the dish.

Instructions

Foundation and Initial Layering

1. 1Preheat and Prepare
   Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish with nonstick cooking spray or a thin coat of butter to prevent sticking. Gather all your prepared ingredients, including the cooked pasta sheets, diced ham, and creamy white cheese sauce, so that the assembly process is smooth and organized.
   Look for The oven is preheated and the baking dish is evenly greased.
   Tip Greasing the dish thoroughly ensures the bottom pasta layer does not stick.
2. 2Spread the Base and First Pasta Layer
   Ladle about one-half cup of the creamy white cheese sauce into the bottom of the prepared baking dish. Use an offset spatula to spread it into an even, thin layer. Lay three cooked lasagna sheets side-by-side over the sauce, trimming the edges if necessary to fit the dish perfectly.
   Look for The bottom of the dish is coated and covered with pasta.
   Tip A thin layer of sauce on the bottom keeps the pasta tender and prevents burning.

At the end of this phase, the bottom of the baking dish should be lightly coated with a thin layer of white cheese sauce, and the first layer of pasta sheets should be neatly arranged on top. The sauce acts as a barrier to prevent the pasta from sticking to the dish, and it should smell rich and creamy, with no dry spots visible on the bottom pasta layer.

Assembling the Middle Layers

3. 3Add Ham and Sauce Layers
   Evenly scatter half of the diced ham over the first layer of lasagna sheets. Pour about one cup of the creamy white cheese sauce over the ham, spreading it gently to cover the meat. Place another three cooked lasagna sheets on top, pressing down lightly to compact the layers.
   Look for The ham is evenly distributed and covered with sauce and pasta.
   Tip Pressing down gently helps prevent air pockets from forming in the lasagna.
4. 4Repeat the Layering Process
   Scatter the remaining diced ham over the second pasta layer. Pour another cup of the creamy white cheese sauce over the ham, spreading it evenly. Lay the final three cooked lasagna sheets over the top, aligning them carefully to cover the entire surface of the dish.
   Look for The final pasta layer is in place, covering the ham and sauce.
   Tip Ensure the top pasta sheets are flat to allow the topping to melt evenly.

By the end of this phase, the lasagna should be fully assembled with alternating layers of pasta, savory diced ham, and creamy white cheese sauce. The layers should look uniform and level. The dish will feel heavy and compact, with the savory aroma of ham and cheese starting to combine even before entering the oven.

Baking and Broiling to Perfection

5. 5Apply Top Sauce and Cheese
   Pour the remaining creamy white cheese sauce over the top layer of pasta sheets, spreading it to the very edges to prevent the pasta from drying out. Evenly sprinkle the shredded mozzarella cheese over the sauce, covering the entire surface to create a generous, uniform layer.
   Look for The lasagna is completely covered with sauce and shredded cheese.
   Tip Spreading the sauce to the edges keeps the pasta corners from turning hard.
6. 6Bake, Broil, and Garnish
   Bake at 375°F (190°C) for 25 minutes until bubbling. Broil for 2 to 3 minutes until the cheese is deeply golden-brown. Let rest for 15 minutes, then garnish with chopped fresh parsley before slicing and serving.
   Look for The cheese is bubbling and golden-brown, and the parsley is sprinkled on top.
   Tip Resting the lasagna is crucial for clean, structured slices that hold together.

At the final checkpoint, the lasagna should be bubbling vigorously around the edges, and the cheese topping should be beautifully browned with deep golden spots.

A toothpick inserted into the center should slide in easily, indicating the pasta is tender and the interior is hot. The kitchen will be filled with a rich, irresistible aroma of melted cheese and baked ham.

Common mistakes

One common mistake is adding too much sauce between the layers, which can cause the lasagna to become soupy and fall apart when sliced. To avoid this, apply the white cheese sauce sparingly and evenly using an offset spatula.

Another error is not letting the lasagna rest after baking; cutting into it immediately will cause the layers to slide. Allowing the dish to rest for at least 15 minutes helps the sauce set and ensures neat, clean slices that showcase the distinct layers of ham, pasta, and cheese.

How to tell it’s done

The lasagna is fully cooked and ready when the cheese on top is completely melted, bubbling, and has developed a deep golden-brown crust.

Since the ingredients, including the ham and cheese sauce, are already cooked, the primary goal is to heat the lasagna thoroughly to an internal temperature of at least 165°F (74°C) and allow the pasta to absorb the flavors. You can verify this by inserting a food thermometer into the center of the dish. The edges should be highly active with bubbling sauce.