Here’s a good idea from Real Simple for a picky eater: make a game out of how many more bites/peas/etc. the child has to eat by rolling the dice. From the site:
Decide how many more bites of dinner your child has to eat before being excused. Let your child roll so he’s the one controlling his fate. You’ll end up with a more peas-ful family meal.
I’m filing this idea away for the future. I have a feeling I’m going to need it.