"Mmm, Master Caleb. Eat vegetables you must. That is how you can achieve a level 10 Jedi."
"Do you eat vegetables, Yoda?" Caleb inquired.
"Of course! Why else do you think I am so green?"
Caleb processed the thought for about a quarter of a second, and then smiled and scarfed down the entire plate. Since then, he always eats the vegetables I give him, often eats them first, and has even been known to ask for vegetables!
Had I but known it was that easy!