To ask how do you stop yourself eating "leftovers"?

[fadetoblack]

I have managed to put on over a stone in a year since becoming a mum and then working part time. I have a toddler and often find myself finishing off his biscuit/ toast/ pasta etc without really noticing I have done it. I will be 40 later this year and I am generally fed up of becoming such a cliché but can't seem to stop myself, so...how do you do it?

I serve small portions and five seconds if they want it. Then leftovers go in the fridge/freezer.

Would rather top the kids plates up two or three times. I always think that the left overs mean I don't have to cook a full meal another time. I hate cooking so that's motivation enough.