Try involving your child in the preparation of a meal by starting at home and planning a meal together, and then again at the grocery store.
Look at everything up and down the produce aisle, name the vegetables, ask him what looks good, smells yummy or simply is beautiful!
Ask him which one(s) he would like to try for tonight’s dinner and how he thinks it should be prepared, for example. Do you think we should bake it? Whole? Chopped? Mixed with other ingredients?
By giving your child some power in the decision of what he will eat, you take away the idea that he’s forced to eat a particular dish.