Make it yourself foods. My DD doesn't like spaghetti sauce but if she gets to make her own pizza she will eat the whole thing. There is a great disney princess gummy vitamin. She thinks it's candy. We also do the carnation instant breakfasts on those days that mine refuses to eat. If you can get her to help with fruit smoothies:

Here's our recipe:
* Bag of frozen fruit- Target has a great one with mangos and strawberry and blueberry.
* Whatever fresh fruit you have around- Banana is yummy
* a small container of yogurt- any flavor
* a cup of juice- apple or cranberry seem to be our fav
* Ice
Toss is all in the blender. And whatever doesn't get devoured we pour into freezer pop trays and she has them after school for a snack.

But with these you get two servings of fruit and a serving of dairy and the fruits are all mostly high fiber.

Hope this helps. Dried fruit snacks are a winner here too. They even sell them at the dollar store!