Sass your not alone here, hamish was the best eater of everything until he was 18 months and then he started becoming fussy, i have learnt a few tricks from my mum.
I make vegie cakes with whatever vegies i have at the time, just mix with and egg and some bread crumbs and grill them, he loves them. He loves fruit so lunch time is usually fruit and yoghurt. Breakfast he has become fussy also and since i am dieting we make a smoothy either with a bananan, yoghurt and dash of honey or frozen berries.
Another simply thing i do is use the noodles from 2 minute noodles and throw some grated vegies into it and he loves it. If we are having a roast i cut vegies to look like chips and he will eat them.
He is mad on dipping so if i cant get him to eat something usually if i have cheese dip or gravy etc on plate he will have some.