Place only a small amount of food in your child’s plate.

It may be good to start with one tablespoon of food for each kind of dish. If he cleans his plate, it will give him a sense of accomplishment. A child can always ask for a second serving, if he wishes to eat more.

From: http://gagazine.com/10-tips-on-how-to-make-meal-times-work-for-toddlers/