We have fresh donuts and bagels loaded on board for every trip. Nine times out of 10, the pax never even touch them. It's a bad combination having free donuts and coffee near a poor, hungry pilot.
I used to pack granola bars, protein shakes and turkey sandwiches in a soft-sided bag at my previous job. I think that, combined with the snack ideas from the previous posts would be a good route to help me bypass the donuts. Don't know about the peanut butter and banana sandwiches though.