My 3 yr old eats half as much as my 1 yr old!! He will eat plain boiled pasta spirals, spaghetti hoops/ numbers/ dinosaurs etc, fish fingers, cruskits, pear.... My husband does a great trick where he shouts out " shop's open" and "sells" little snacks which is a fool proof way of getting him to eat. It seems to change very day what he will and won't eat. I try to ask him what he wants (offer him 3 choices) and try and get it on the table by 1730.
We are in a holding pattern, not winning but not losing either. It doesn't help that DS2 eats everything offered to him and then some!!!
Good luck everyone else.