I completely agree with Don, smaller plates, smaller portions. I grew up having to clear my plate and that habit stuck. Before surgery I invested in small forks/spoons (I found small silver ones on amazon) and a bunch of 4oz. tupperware type containers to portion out my food for home and if I take lunch to the office. I always eat on a smaller plate (salad plate) now and only take 4oz. at a time. I can clean my plate, be completely full and not waste anything. Eating out may be more challenging, ask for a side plate and put a portion on that and eat. The rest take home.
You can work the problem, it doesn't have to control your success.