The easiest and tastiest breakfast casserole recipes are featherbed eggs, which are often made overnight in preparation for parties or for parties. These recipes can be adapted to suit any craving, with a base of bread, cheese, eggs, and milk being added. The cassero can be pre-made overnight in the fridge to soak the rich custard and comes out light, puffy, and sliceable the next day. The light texture of these eggs gives them their name and the overnight prep makes mornings feel effortless. Featherbed eggs can be made up to 24 hours in advance and can be customized to suit a specific craving. The fully baked casserlo can also be frozen for up to one month and leftovers can be leftovers stored in the refrigerator for three days.