Make things spoil!
Meat, baked goods, crops. They should all get bad, rot/spoil over time if not used.
Of course you can prevent spoilage by storing them in cellar or something.
Perhaps there could be many stages. Right after baking/roasting food would be like steaming/sizzling. It gives some extra feps.
Then it would turn to the usual stuff that we have now. After some days it would get stale and give you less feps. And in week(s) it would spoil and be unedible. Or edible but you would only get the hurt-fep. Perhaps with a chance of dying in sepsis as well.