Remove the husks from the baby corn. Cut the baby corn and corn silk into bite-sized pieces, then coarsely chop the onion.
¼ onion
Heat the oil in a pot and sauté the onion until softened.
oil
Add the remaining ingredients except the soy milk. Bring to a boil over medium heat, then reduce the heat to low, cover, and simmer for 5 minutes.
100 g baby corn, 30 g corn silk, 200 ml water, 1 tbsp onion koji
Once the baby corn is tender, remove the pot from the heat and stir in the soy milk. Let the soup cool completely, then refrigerate until well chilled.
300 ml plain soy milk
Season with salt and pepper to taste before serving.