Of course, some sandwiches end up being a bit more abstract than others. Take for example the banana and mayonnaise sandwich.

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Mayo may in fact give you better-grilled cheese, and it can also be used as part of unexpected sandwich fillings like banana and mayo. So, if you simply can't imagine a sandwich without mayo but ...

Earlier in the broadcast, Barrie and Murray tried a mayo-and-banana sandwich. The reviews were mixed that time, as well. "It's like a banana Tuna salad," Barrie said. "We love you Duke's.