My little darling was the exact opposite when she was that age, a hyper-picky eater. The food had to be in the white family (potatoes, pasta, bread) and underseasoned. She once declared: "My palate is too sharp!" It was a huge challenge not to make a big deal out of it and eventually she came around. She still hates tomatoes and isn't crazy about mushrooms (unless they're morels), but will try just about everything.
You can meet "Hungry Monkey" author Amster-Burton June 1 at the UW Bookstore. Not sure if he and Iris will be making anything for the audience to eat!