You can sprinkle oat bran on yoghurt ( it's ok doesn't hurt) or you can make porridge with milk and water. Not sure what else. Those are the most immediate and instant. And also oatbran gallettes - with egg whites rather than whole eggs. I mostly have muffins
Cookies without egg:
The topic is called crunchy dukan biscuits. .tried to link it, but it won't do it from my phone.
Made these a few days ago and quite like em.