I wish Jacko would eat raw veggies (some she does---but it has to be ones she likes...if she's in the mood). Except in the case of the orange/dark green veggies (apparently steaming them or boiling them brings out the vitamin A etc more) raw is always better.
I would honestly forego the baking if I knew a way to get her to accept the food as readily as she does when its cooked---but baking it firms it up and takes a lot of the water out of it (if its wet n cold forget about it).
Basically, I boil Jacko's carrots/yams etc (or bake in the case of squash) to soften it up, everything else is chopped up raw and pureed in the blender. Then I mash/puree the carrots etc and add it to the pureed kale, collard, broccoli, watercress, papaya and banana---mix it as well as I can then I pop it in the oven at 350 for 45 mins.
Might not be 'the best' in terms of freshness, but she eats it all (and readily).