at the moment preserving raw food is as simple as digging a basement and putting ice to cool the room down even further
One of the main reasons this is ahistorical is due to a fact those kinds of cellars would be full of mildew and mold which would destroy any raw food
The game should guide us towards preserving food either as flour or dried and salted meat instead of raw ingredients
Additionally mildew and mold would make a good feature to make people sick if they eat any spoiled food