Porridge

I find that porridge keeps me going much longer than toast. I use proper oats, milk and water. 1 min 30 secs in the microwave. Add frozen blueberries while it's still hot, or honey, or any fruit. Lovely !

Janeainsworth. That's exactly what I do!

I always use proper rolled oats or pinhead oatmeal and after soaking it overnight I add salt and cook it until soft and add cream or milk to finish it off. I eat it with cream or milk too and have never really fancied all the exotic variations mentioned by PPs. Don't know if I would like it like that so probably ought to try some of the ideas.
It is my comfort food particularly if not feeling too well and needing something warm and easy to eat and digest. It keeps me from feeling hungry for a long time but probably because I fill my bowl; in fact I could easily live on it!

Porridge made with half milk/water, a dollop of Greek yoghurt and a tiny drizzle of honey keeps me going until lunchtime.

I use wholegrain rolled oats and cover with water and microwave for three minutes. My GC say I make the best porridge, they like theirs with milk and raw honey. One GS eats it for breakfast every single morning and it a favourite snack for all of them before bedtime if they are still hungry. After I read that oats are rich in melatonin which relaxes the body and helps make you sleepy, I upped the oats as GC's bedtime snack when they stay overnight.

I have about two dessertspoons of oats in my smoothie every morning with a water, almonds, a banana and seeds. I am not usually hungry until lunchtime.

If you make Bircher Muesli, there are lots of recipes on the net, then there is no cooking in the morning. You just add fruit of choice and yoghurt or milk and you have an instant filling oaty breakfast.