The only thing you can do is to put the food in your depot or use the Hireling food made by the cook. These items are considered store items so they're indestructible. I've tested all these ways so it's verified that you cannot use a disintegrate rune to destroy the item, can't throw store items in a dust bin, throw them on the floor, can't be traded with other players, you also can't put the store items into a corpse and have the corpse decay as this is impossible to do so.