Nasu no miso itame is a traditional dish originating from Japan and it's often used in bento boxes. The dish is made with a combination of eggplants, miso, mirin, sugar, sesame oil, and green peppers. The eggplants are cut into cubes and sautéed in sesame oil over low heat.
Water is added to the pan and the eggplant is cooked until tender. A mixture of miso, mirin, sugar, and chopped peppers is then added to the mix, and the dish is stirred well before it's served. It's recommended to serve nasu no miso itame with steamed rice on the side for a full meal.