German Onion Pie, also known as Zwiebelkuchen, is a traditional German dish that features a savory onion and bacon filling baked in a flaky pastry crust. The onions are sautéed until caramelized and combined with bacon, eggs, and cream to create a rich and flavorful filling. This hearty pie is perfect for brunch or as a main course served with a side salad. It can be enjoyed warm or at room temperature.