Habits are hard to break
Starting as a child I was indoctrinated to the “clean plate club” and it has never left me. I think I may have broken the chain with my children since they tend to bring home half their meal when they go to restaurants. I am learning portion control and it is not easy figuring out that my stomach does not need to be “full” when I leave the table as long as I had a well-balanced meal. I imagine this is why weight loss plans such as Nutri-system do well since you don’t even have to think about what you eat and how much.
My best solution at this time… eat more vegetables until I am full. A half hour after I eat, my stomach doesn’t remember if it is full on bread or vegetables. Eventually I need to learn potion control, but as I said, old habits are hard to break.