Is he complaining that there isn't enough for him to eat? If not, make what you want and let him enjoy what he eats. If he is, tell him to grow up. Even my kids know they have to at least try something before telling me they don't like it and won't eat it.
Really, at some point you are going to let him own his own food issues. Most of the "food challenged" people I know have learned that they have to deal with the fact that not everyone eats the way they do or is willing to cater to them all the time.
Hope that is not too blunt!
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