My nearly 3 year old will not touch a veggie if it is on his plate. I work hard to hide it in as much as I can. Some ideas -
Pumpkin in pancakes - tastes yummy. I add mini-chocolate chips so I can add more pumpkin and still get him to eat them. They freeze nice.
Pumpkin or squash in spaghetti sauce... or beets (they make everything pink), or broccoli and carrots - make your own sauce and cook the vegi's down so they blend in.
Make muffins - there are multiple ideas in the books you mentioned.
Add squash or cauliflower to pasta (this sometimes works for me).
Good luck!
Jessica