Look on the web, there are lots of Vegetarian "meatloaf" type recipes... (If she liked this type thing as an omni, she might like a vegetarian version.) The reason I suggest it is because I cook and mash all SORTS of veggies in the vegetarian "meat" loaf and my kids never notice...
Does she like Mexican foods? Burritos, tacos and such? You can shred veggies and hide in amongst the other goodies in these foods.
A few shredded carrots can hide under the cheese on a pizza and she might not mind. (Cheese will hide a wide variety of things).
How about a dip for her chips? Take a "ranch" style dip and add cooked, drained spinich, a few shredded carrots, etc.
Pumpkin pie, carrot cake, zucchini bread, banana bread, oatmeal-raisin cookies, all of these actually have a bit of veggies/fruit in them and you can find recipes online.