Their food was mainly a diet of wild Boar meat, Sheep, Deer with the food they grew on the farms and the berries and herbs they got from the bushes.
http://wiki.answers.com/Q/How_did_stone_age_people_cook_their_food
They Buried them under ground that's how they refrigerated there items but they stored food in Makeshift larders
They had farms ( crops ) and made them to have food .
Lucky Guess.