You can try using fruit to encourage her. But if she refuses to finish the main course and persist asking for the fruit (with cry...no matter what you say to her), I don't think she is quite ready to that encouragement. Wait for a month or two, and try again.
main
【在 e******l 的大作中提到】 : that's what we are doing. I just want to encourage her to finisher her "main : course" then she can have fruit as : the dessert