Are these sentences correct:
1) He likes his food not too greasy.
2) He wants his food not too greasy.
3) He likes his steak well-done and not greasy.
4) He wants his steak well-done and not greasy.
I think '3' and '4' work.
Normally one would say 'He DOESN'T WANT his food greasy.
But here we have to start with 'want' and I don't see any other way to express the idea succinctly.
'1' and '2' are more problematic. I would personally use 'He doesn't want/like his food too greasy.' But I am not convinced that '1' and '2' are incorrect.
There is another problem. If I am not mistaken Nowadays young people seem to have developed a tendency to say things like 'He is so not busy.' One could write that as 'He is so not-busy'.
Bobinwales has asked me to give my viewpoint on the sentences I asked about so that it would become clear that I was not doing homework here. That is why I presented my viewpoint.
This is the place to post questions and discussions on usage and style. The members of the Wordwizard Clubhouse will also often be able to help you to formulate that difficult letter.
End of topic.