Where are you getting the bread from?
Where are we getting the ale from?
That said, with the current mechanics for food, I'd say either from your own rations, or from your regions' warehouses.
I mean, where does food go when we loot for food? To do the reverse road would seem logical to me. Unless you just make it magic food as we've already got magic ale. The food is not in enough quantities to actually stop the starvation, but enough to get the locals' hopes up. Like the ale, but, better?
