Oldest recipe?
Probably something with berries and fruit. You just pick it off a tree.
Didn’t Eve bite an apple?
Unknown. What she ate was probably destroyed along with "The Garden".
A falsehood that persists for no reason other than lazy writers perpetuating it. She partook of "the fruit of the Knowledge of Good and Evil" that grew in the unique garden God created just for them - a "one shot" the Lord made for a test of their character.
Then again, Genesis is rife with mysterious allegories that defy rational analysis. To me Evolution is clearly a real process that can only fit Biblically if one considers OUR idea of a day totally different from God's scale of time.
Back to subject - the oldest recipes probably involve fermenting alcoholic beverages because that's widely cited as the reason mankind shifted to agriculture from hunter/gatherers.