Try changing up the presentation of the food. My guys look at the plate and won't eat it if I just dish it out...but...if fruit is cut up into shapes, sandwiches into hearts and veggies into 'veggie monsters' you'll be amazed how much more they will eat.

We make it a game to see who an eat all of their veggie monster...plus its a great learning experience. Which fruit is cut into a heart, which one is cut into a circle. Takes a little more time to organize but I find it worth it.