S.B.
My 1 year old eats what we do. We have adjusted the family diet to have no processed foods. She loves pastas - so I mix in squash to make sure she gets a veggie.
On days when she won't eat or we are on the run a lot and meals are not as good as they should be I give her a pediasure (normally the store brand because they are cheaper). These are not an all the time solution, just once in a while. That way I know she is getting the vitamins she needs.