I haven't tried cooking much for him, he just eats some raw veggies...
I don't know the first thing about home cooking for your yorkie, but there is a sticky at the top of this forum --->
http://www.yorkietalk.com/forums/yor...od-treats.html
But my Hiro loves... LOVES brocolli.
He used to eat carrots, but snubs them now in favour of brocolli...