sometimes I have to almost force myself to consider lunch, I'm not hungry for it.
I usually have protein of some sort (frequently a custard concoction that I make and cook in the microwave once I get to work).

Even when I have tuna salad or something similar, I am usually quite content until lunch, and my breakfast is sometime between 0630 and 0700, so it is a reasonable distance from lunch.

Plenty of water, or even a cup of herbal tea may help abate the cravings. Even a legal snack (depending on where you are on the plan) may help with your problem.