Now fast food won't even have to use 'food', it'll just be crap with berries.
Anyways, since when do we need a miracle berry to prevent world hunger? With our current production methods - even though it's horribly inefficient and unfocused - we produce WAY more food than it is necessary to feed every single human being.
What do we do with it right now, that keeps it from being used? We store it to sell it... For LONG period of times. Oh, corporations also encourage the compulsive consumer to trow out anything that doesn't look tasty or right, be wasteful and stuff. (which is why half of US food goes to waste 1 2 3)