I never cook for my freezer, the only things I have ever frozen are left over chilli, or spag Bol sauce, as a result lots of left overs get thrown away. The things is I don't know at what stage of cooking you fees things and so would worry about poisoning people (my cookings bad enough).
I am making a veg Lasagne at the weekend there will definitely be left overs can I freeze them once the whole Lasagne has been cooked or not?