Agree with icecold, try adding porridge/cereal/toast in there, I did just fruit for breakfast for a week and it just made my feel very tired by about 10:30 once the initial sugar high dropped off. I tend to have a fruit porridge with some banana or strawberry chopped up on top and that keeps me going nicely until lunch.
cereal i do have at times, porridge never really tried it much but yeah i might give it a try at work since they do sell it in the canteen now.
I useally have cereal for breakfast then have a sandwidge at lunch followed by a real dinner at 5pm so i'm looking to reduce the calory intake i have, maybe i need to look at it at a different angle