I would bring a small butane type stove and buy cartridges as needed. And I would bring a pot about one liter in size with a long handled spoon. That means that you would also need some soap and a cleaning pad. This way you can fix a warm drink such as coffee or tea or hot chocolate in the morning or evening, have soup on occasion for a meal, maybe a stew or rice meal occasionally too. Cost for this is not very much and it packs down small. You could buy this gear once you get to France, as then you would find out what fuel cartridges are most prevalent.

When traveling alone, besides coffee in the morning, I often have a small pot of Ramen soup in the morning. It is fast, filling, warm on cool mornings and costs almost nothing. I don't carry a bowl when traveling alone, eat it out of the pot.

A pack of rice and a can of stew can make a pretty filling meal. May not win any gourmet awards, but it is fast, cheap and filling. Plus, for many meals you can use non-perishables such as this, so you can keep a few meals worth of food in your pack without worrying about it going bad.



The trip that produced this photo, I carried a liquid fuel stove but if I was going on your trip to France, I would use a butane stove as it is smaller and lighter.

Some people rely on alcohol stoves for a trip like yours but I have never used one so I have no opinion on them.