A.H.
I have discovered my son really prefers steamed vegetables to other methods (canned, boiled, frozen). We are just firm with him - there is usually something for dinner he really likes and we regulate how much of that he gets by how many vegetables he eats. We don't insist he eat an entire helping - just a few bites.
I hated it when I was a kid, but I am grateful now my parents insisted I give everything a try.