Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish to prevent sticking and ensure easy cleanup.

Note: A well-greased dish will ensure that the casserole doesn’t stick, making it easier to serve.

In a skillet over medium heat, cook the ground beef along with the diced onion, garlic powder, parsley, salt, and pepper. Cook until the beef is browned and the onions are softened, about 7-10 minutes. Drain any excess fat.

Note: Browning the beef adds depth of flavor. Don’t skip draining the fat, as it will help prevent the casserole from becoming too greasy.

In the greased baking dish, spread the drained sauerkraut evenly on the bottom. Sprinkle the brown sugar over the sauerkraut.

Note: Draining the sauerkraut well is crucial to avoid excess moisture in the casserole. The brown sugar balances the tangy flavor of the sauerkraut.

Layer the cooked egg noodles evenly over the sauerkraut. Then, top with the cooked ground beef mixture, spreading it evenly across the noodles.

Note: Wide egg noodles are ideal because they hold their shape during baking and absorb some of the flavors without becoming mushy.

In a bowl, whisk together the tomato soup and one can of water until smooth. Pour this mixture evenly over the layered beef and noodles.

Note: The tomato soup acts as a sauce, adding moisture and flavor to every layer. Be sure to pour it evenly so that the casserole bakes uniformly.

Sprinkle the shredded Swiss cheese evenly over the top.

Note: Swiss cheese melts beautifully, creating a creamy, bubbly topping. You can substitute with other cheeses like cheddar if you prefer a different flavor profile.

Bake in the preheated oven for 30 to 45 minutes, or until the casserole is hot and bubbly, and the cheese is fully melted and golden.

Note: Check after 30 minutes to avoid overcooking. The casserole should be bubbly, and the cheese lightly browned.

Allow the casserole to stand for about 5 minutes before serving to let it set and cool slightly.

Note: Letting the casserole rest will make it easier to serve and will allow the flavors to meld together.