I guess this is likely a bit of work since items seem to be hardcoded, but nonetheless I wanted to suggest the idea.
When we're cooking, we have recipes like pie and many different fruits that seem appropriate for pie-ifying. However, we're hard locked to only having pies of the available types. It would be a neat ability if we could use any acceptable fruit (whatever that criteria happens to be) and get a pie of that fruit type. Preferably without having hard coded pie types, so this could be more flexible in the future.
Under that system, making a pie of something would add as a FEP multipler on the base fruit, possibly with a secondary stat added to all pies. I'd personally say FEP of the filling * an appropriate multiplier + a sliver of con perhaps?
This would instantly give all of the various FEP fruits in game a use in one fell swoop, and open up possibility for similar style recipes such as stews and soups without needing to hardcode a million different items in game.