I'm fortunate that my daughter has never been very picky.
One thing that I have always done, however, is incorporate 1 dish that I know she likes into each meal. With this 1 dish already there (her fallback dish), she was more receptive to tasting something else that was served.
Once in MDO the children were asked what their favorite foods were...hers was steak, lobster and lamb, LOL
I try to expose her to everything and let her choose what she likes. I also used to make her snacks like ants on a log, faces in a plate with fruit, etc. Anything to interest her.
Good luck...she will eat when she is hungry!!