I eat healthy food, I don't eat processed food and make most stuff from scratch. But when I do cook I have ALOT of what I eat. I can go back and get third helpings 
I need to get my portions under control but I don't really know where to start. I had a quick look on the internet and was horrified by the suggetion of a palm sized piece of meat.
I exercise a lot - shred/running etc (4 times a week on average) so I don't know if this makes me hungrier. (I am 5'11 and I weigh 11stone 11lbs)