My suggestion in dealing with a picky eater is to be very creative and very animated. With my son, he loves pizza, but he hates peas. So I think it's very important that he eat his peas, and I think it's a non-negotiable. So I make pizza the prize. The creativity comes in different forms. One thing I would do is I would serve the pizza and the peas. I would have the pizza be the main course and the peas be the appetizer. I would make a whole story to him about how Batman called, and Gotham City is under attack by the peas. There is only one six year old boy that can help save Batman. If he is to save Batman, he and Batman are going to have a pizza party together. But in order to save Batman, he has to eat all the peas in Gotham City. He will think it's a fabulous idea, and he would have the best way to get rid of the peas in Gotham City, and it would be to eat them.