Iguana's diet plan! Need tips and as much advice as I can get!?

Okay, I have a juvi iguana, and I'm working on improving his diet right now. I'm wondering if it would be okay to take some collard greens or arugula and mush all of it up with the rest of his food into almost a mush? And freeze it so I have alot of food and just thaw little bits at a time and give it to him.. I appreciate and tips on making feeding easier :) thanks for all your advice!