Why Am I Always So Hungry??

Any ideas on what I should eat for lunch in about an hour? Something with protein but low-carb.

Salad with olive oil, avocado, and a can of tuna or 3 oz. of your favorite protein. Do throw in a some carbs though. Like a half serving at least. I throw like a quarter cup of yam or rice on top of my salad. You could also have a piece of bread or toast on the side or a piece of fruit.