Personally, I like pan bagnat type sandwiches for lunch (think baguette with
a wettish spread and veggies, wrapped tightly in cling film to soak a
little). And salads of grains+veggies, or beans+rice+veggies. I don't
ususally like pasta salads, but of course it's an option.

I also like carrot sticks with a dip of yogurt+tahin and a bit of lemon
juice and salt.

Then of course there's fruit and there's soy based "fake" dairy. So yogurty
things become an option.

I have no idea how your daughter would like those types of food, of course.