Easy Baked Reuben Casserole with Toasted Rye Step-by-step instructions

Before you start

Before beginning, ensure the oven is fully preheated to 375°F (190°C). Prepare all ingredients by cubing the rye bread into uniform one-inch pieces and chopping the corned beef into bite-sized strips.

Drain the sauerkraut well to remove excess brine, which prevents the casserole from becoming watery. Have your baking dish ready and clear a space on your counter for the assembly process to keep everything clean and organized before you start the active cooking phases.

Instructions

Assembling the Layers

1. 1Prepare the Base
   Preheat the oven to 375°F (190°C). In a large mixing bowl, combine the cubed rye bread with the drained sauerkraut and chopped corned beef. Toss the mixture gently to ensure the ingredients are evenly distributed throughout the bowl before transferring to the baking dish.
   Look for The mixture is evenly combined.
   Tip Ensure the sauerkraut is well-drained to keep the casserole from becoming too soggy during the baking process.

The mixture should be thoroughly combined in the bowl so that every piece of bread is in contact with the moisture from the sauerkraut and the corned beef.

The bread cubes should be evenly coated but not saturated. Once transferred to the baking dish, spread the mixture out to ensure an even bake, creating a flat surface ready for the cheese topping.

Baking to Perfection

2. 2Assemble and Bake
   Transfer the mixture into a 9x13 inch baking dish, spreading it out into an even layer. Sprinkle the shredded Swiss cheese generously over the top. Place the dish in the preheated oven and bake until the internal temperature reaches 145°F (63°C). Let the meat rest at least 3 minutes before serving.
   Look for Cheese is melted and golden brown.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Cover the dish with foil for the first 15 minutes if the bread cubes begin to brown too quickly.

During the baking phase, watch for the cheese to melt fully and begin to brown. The smell of toasted rye and melted cheese should fill the kitchen. If the bread on top looks like it is darkening too rapidly, lightly tent the dish with aluminum foil. The dish is ready when the center is piping hot and the cheese is bubbling throughout.

Resting and Portioning

3. 3Rest and Serve
   Remove the baking dish from the oven and allow it to rest for at least 5 minutes before serving. This rest period allows the layers to set, making it easier to portion out neat slices for serving. Use a metal spatula to lift portions onto plates.
   Look for The casserole has set enough to hold its shape.
   Tip A metal spatula works best for cutting through the toasted bread cubes and lifting the cheesy layers.

After removing the dish from the oven, allow it to sit undisturbed. This phase is critical as the fats from the cheese and the juices from the meat settle. The casserole should look stable and firm, not runny. Once rested, use a sharp metal spatula to cut clean, structured squares that showcase the distinct layers of bread, meat, and cheese.

Common mistakes

A common mistake is using undrained sauerkraut, which releases too much liquid and ruins the texture of the bread cubes. Another error is overcrowding the baking dish, which prevents the top layer of bread from crisping properly.

Always ensure there is enough space for the heat to circulate. Finally, failing to let the dish rest after baking makes it difficult to serve clean portions, as the layers may slide apart when lifted with a spatula.

How to tell it’s done

The casserole is done when the Swiss cheese has formed a deep, golden-brown crust and is bubbling vigorously across the entire surface. The edges of the rye bread should be toasted and crisp, providing a nice contrast to the softened, savory center.

Because the corned beef is already cooked, the primary goal is reaching an internal temperature of 145°F (63°C) throughout the dish and ensuring the cheese is perfectly melted and aromatic.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest