I go rather low-carb for most of my meals, so when I pack bike food, it's often carrot sticks, cheese sticks, celery, almonds/pecans. I often make a batch of "chuck salad" or coleslaw. I keep a block of cheese and bottle of mustard, olive oil, vinegar and garlic salt/pepper at work. When I don't have time to make a 1/2gal of chunk salad for the week, I can just lug a can of olives, celery and radishes/salad turnips/kholrabi/celeriac and chop it up as I need it.