You should try my teff bread on the coconut bread post, it gives you more energy in general…
I would also look at preparing big salads and putting them in tupperware containers for lunch.
Another idea is to make the pumpkin pie muffin bread and bring this around for snacks.
If you can carry some kind of ice pack with you, you could bring greek yogurt as well (just need a bowl and a spoon).
I bet the teff bread would also be good as a sandwich bread, might consider giving it a try.
If you like cold leftovers, you could cook up some chicken or buckwheat and bring it with you.