To the person who doesn't like porridge.....neither did I until I started camping and it became a staple.
Cinnamon, honey, fruit & nuts make it a delicious breakfast!
@Lovacott your situation is pretty unique since you only eat once a day - there's not many people who do that so what others do may be of little use to you.
Based on your threads you've undertaken a massive change in lifestyle since you took up cycling. Your body is still adjusting. It may take some time.
It's also (at least) your second thread on how miserable your commute to home is. There is also the possibility that it happens near the end of your waking/nutrition cycle and you're not a machine!
I have no real advice except to try different options and see which works the best for you.
You said one bananna wasn't too bad - how about two? Or throw some peanut butter on one.
Or if you're a bread and cheese man then pack some and eat that before you leave. Chocolate milk is often recommended as a restorative, maybe a hot chocolate before departure?
Aside from the physical, there are also psychological factors. Now it's dark, cold and probably wetter. The rapid improvement you've seen in fitness, physical shape and form is slowing. These things can have a negative effect and exaggerate niggly things.
I'd suggest concentrating on the things you do like about your ride home rather than the things you don't.
Good luck
