Don't forget some children need to see a new food on their plate 15 - 20 times before it becomes familiar enough for them to eat it. I'd try giving him something you know he will eat on the plate along with 1 or 2 new things - eventually if he sees it there often enough, and everyone else is eating the same thing, he might think to put it in his mouth. Don't conclude because he's refused it half a dozen times that he doesn't like it. Just keep trying.