Yusuke said that this stew tasted was reminiscent of にくじゃが (nikujaga), which is a meat and potato stew. (Sometimes, shirataki “noodles” are also included.)
First, Yusuke sauteed chicken and white onions. Oil could be added, but he chose not to. Next, he added chopped (unpeeled) Jerusalem artichokes. He then added water to the pot, along with cut carrots and let everything cook until it was soft.
Finally, he added the foundational Japanese seasoning mix: dashi, sugar (a pinch), soy sauce, and mirin, all to taste.
These ingredients were added in order to highlight the vegetables’ own taste rather than cover it. In other words, it brought out the taste of the earth. This is why our summer and autumn food baskets were so great: REAL TASTE. Store-bought food, in contrast, is often tasteless. This particular dish was even tastier the next day, becoming sweeter when the flavours came together and really soaked in.
I would like to comment again that Jerusalem artichokes are awesome. The little knobby things look like ginger, and evidently the chemical compound that is released when you eat it works similarly to insulin. Yusuke was interested to find lots of recipes with them in Japanese (キクイモ – kikuimo). The texture is similar to potatoes, but more liquidy and sweeter.