I'm trying to eat clean (no sugar, few packaged foods, etc.), and I need help with packing my lunch. I've been packing a salad (all vegetables) and a piece of fruit, but by the end of school I have the shakes and feel like I could down a gallon of ice cream. Plus, one of my friends thinks I'm relapsing into anorexia, so I need a new plan.

My only criteria are 1) nothing that needs refrigeration 2) cheap 3) minimally--if at all--processed 4) no added sugar or additives 5) enjoyable