Suppose a Kid from the Last Dungeon Boonies Moved to a Starter Town, Vol. 12 (light novel) — Toshio Satou

As the threat of war with Jiou looms near, the Azami army and the guilds prepare to conduct military exercises. Everyone is split up and placed into different departments to help with the preparations, but only Lloyd is put on mess reserve. It's the perfect assignment to utilize Lloyd's cooking skills and prevent internal fighting among the higher-ups... However, he unknowingly crosses the border and ends up feeding enemy soldiers who are charmed by his delicious meals. Maybe peace will be established before the war can even begin?!