How do you get stubborn friends to try new foods?

I have a friend who is so anti-new food that he ends up ordering from the kids menu sometimes because most of the food on the menu he doesn’t like.
I don’t want to exclude the guy from when groups of us go out but if it’s sushi, Indian, middle eastern, French, or anything even a little exotic, he just can’t deal with it.
Too bad because he’s really missing out.