The endless stew, which you would not be eating on the way, because it takes a long time to cook and you don't have the stuff anyway. Then, you will be able to forage and hunt and eat something besides dried meat, cheese, and bread. One panelist talked about the importance of learning about camping. (I talked of a story where the writer kept on having one character look after another by heaping blankets on top of her during the snow -- underneath, folks, underneath, the earth is even more dangerous than the air, and she agreed that was exactly the problem.)
And cooking. Don't put the spits on the fire, put them beside the fire and catch all the lovely fat. Otherwise it will drip on the fire, the fire will blaze up, and your meat will get burnt. Put the pot next to the fire too.
The importance of pots. One panelist brought up that hunters and gatherers are not sedentary, and I was able to point out that they, rarely are. In Japan, they were so sedentary that they were able to invent pottery, which produced a population explosion because they could steam open shell fish, they could keep on feeding people who had lost their teeth or wean babies young because they could produce mush, they could remove poisons by boiling, etc.
Butter vs. olive oil. As it happens, the line at which olive trees stop growing is also the line at which you can put out milk and have the cream rise and not go bad.
Localized food customs. One panelist came from a mixed marriage: Sephardic and Ashkenazi, only one of which eats rice during Passover. The ancient Greeks made their sacrifices and then divided up the meat into equal chunks which were assigned by lot. Any region where travel was hard would have changing customs over quite short distances.
In the north of Europe, wine was a luxury good. In the south, beer was. Whatever had to be imported was pricey and so luxury. (Though mead was a luxury even though honey was local. Must be the size of the crop.) You can track Roman conquests by the amphores.
Romans also invented the first MREs, made of dried hardboiled eggs.