Overnight Breakfast Casserole

I first came across “breakfast casseroles” when I lived in the States. Essentially, they are layered gratins or bakes, sometimes called a “strata”, which is similar to a baked frittata or a savoury bread pudding. They can be made with cubed stale bread or potatoes, but the key ingredients are eggs and cheese, which are always added to “bind” the bake or casserole together. Breakfast casseroles can be meaty or vegetarian and they are usually assembled the night before, which makes for an eas