I couldn't decide if this should go in Recipe Swap or Feeding for Toddlers!!

Please feel free to move if you like!! Spagetti bolognaise is one of my favourite dinners. And DS will actually usually eat some, which is a miracle, cause I swear the kid survives on air, not food!

Man, fussy eating sucks!!
Anyway, I have gotten lazy and stopped adding veggies to it, which I know that I should be because apart from corn on the cob, he eats NO veggies.

I used to have some purred carrot and zucchini in the freezer to add to it, but what other veggies should I put in it?? Please bear in mind that they have to be pureed, cause if he notices, he won't touch it again (I have learnt this the hard way!!)
What do you put in your spag bog that the kids don't know about?? Any other toddler favourites that are easy to hide pureed veggies in? His none eating is driving me bonkers!!
Melissa