Growing up, one of my all-time favorite snacks was a banana-peanut butter sandwich. Which is simply a banana cut in half with peanut butter in the middle. I still love it, and occasionally make it for myself.
I've made it for myself a few times recently. The first couple times, Jake had a bite of what I made for myself. Then it progressed to him eating it all, and I would have to then make another one for myself. Now he is asking for them for a snack for himself. He has had a banana-peanut butter sandwich every day for the past 3 days now. This morning he woke up and stated he was hungry. When I asked what he wanted to eat, it was "banana-peanut butter sandwich!!"