Thinly slice the cabbage. Rinse and soak it in cold water for 2 to 3 mins. Drain the water and air dry while preparing the other ingredients.
Rinse the radishes in cold water and clean/trim the root and stems. Thinly slice them.
Grind the roasted sesame seeds in a mortar until fine. Mix all the dressing ingredients in a bowl. (I used a mix of yellow and black roasted sesame seeds as I ran out of yellow ones. It won't change the taste if you do it differently to mine.)
Serve the desired amount of cabbage and radish on a plate and add the dressing on top. Alternatively add all ingredients in a mixing bowl and gently mix them. Serve. Best to consume within 24 hours of making it.