I had a HUGE problem with cleaning up my kids plates. It all went down my throat. NOT good.
I have realized that it is more sinful and more wasteful to eat foods that are unhealthy or to eat food while not hungry, then it is to throw it in the trash can. I can either throw it in the trash can or be the trash can. I no longer choose to be a human garbage disposal. In the trash it goes.
Can you freeze some of those leftovers for the kids, and give it to them for another meal, later in the week?
I also find that counting calories, for you it's points, helps greatly in cutting down on "nibbling". It's so easy to graze yourself fat from a nibble here and a nibble there.
It also helps me
immensely to distinguish "their" food, from "my" food. It's "theirs" - it doesn't belong to me. It wasn't intended for me. In other words - hands off buddy.