GB-
I can understand how you, as a budding epicure, might not be thrilled with your school lunches, but we may need a few more details:
I assume you can bring a lunch to school.
Can you bring it in a cooler? Your hope for chicken-something suggestions brings this to mind. There are endless chicken salad possibilities giving you meat, veggies, bread (croutons) and other stuff. You could even have garlic croutons, if you're not worried about alienating your fellow-students.
Hey, if you do the garlic right, maybe you could get sent home early!
But, obviously, you need to make sure you don't get done in by the chicken and mayo between prep time and lunch time.
Anyway, let us know, and I'm sure BDL and others will have suitably sophisticated suggestions. I'll try to help.
Mike