Imagine starting your day with a comforting and flavorful breakfast casserole that's as satisfying as it is simple. This hash brown breakfast casserole is a delightful combination of textures and tastes, offering a rich and creamy experience with every bite. The heart of this casserole lies in the subtly earthy flavor of celeriac, the root of celery, which provides a satisfyingly starchy base reminiscent of potatoes, but with its own unique character.

You could also use parsnip, kohlrabi, or even the often-discarded stalks of cauliflower to achieve a similar effect. The beauty of this dish lies in its versatility. A medley of cheeses, such as white cheddar, mozzarella, parmesan, and gouda, melts together to create a gooey, golden topping that adds depth and complexity.

Feel free to experiment with your favorite cheeses, or even explore vegan alternatives. For a heartier casserole, crispy bacon adds a smoky, savory element that perfectly complements the other flavors. However, you can easily adapt this recipe to your preferences by substituting breakfast sausage, Italian sausage, or even mushrooms for a meat-free option.

What truly sets this breakfast casserole apart is its convenience. It can be assembled ahead of time, making it an ideal solution for busy mornings. Simply prepare all the ingredients, except for the eggs, and store them in the refrigerator for a few days.

When you're ready to bake, whisk in the eggs, sprinkle on the cheese, and bake until golden brown and bubbly. This casserole is also perfect for meal prepping. Prepare a batch or two and portion it into individual containers for a quick and nutritious breakfast throughout the week.

A slice of this casserole is a great alternative to processed breakfast options, providing a wholesome and protein-packed way to fuel your day.