I am a hopeless cook so DD gets a lot of bought things but I have found some good things as well.

-Capsicum cut up into slices with some homus (loves this) and its quick and easy to do)
-Sandwiches on wholemeal with avocado, tomato, cheese (if we are at home I melt the cheese on the toast like an open grill) but you could just do avocado and cheese or whatever DD likes.
-Fruit galore
-yoghurt

I'll keep thinking