If you use leftover rice, make sure you reheat it for this recipe. The purpose of this ingredient is to thicken the soup, so the rice should be softened and warm.
If using store-bought toasted black sesame seeds, it is a good idea to toast them in a dry pan or wok for a couple of minutes over medium-low heat until you start to smell the sesame aroma. It is important to bring back the aroma for this recipe.
Toast the walnuts in a dry pan over medium heat for 6-7 minutes, until fragrant.
To a high-powered blender, add the warmed cooked black rice, toasted sesame seeds, toasted walnut halves, and just-boiled water. Cover tightly and securely (the contents are hot!), and blend on high speed for 2 minutes. Pour into 2-3 bowls. Serve hot or warm, adding honey or sugar to taste.
Notes
Nutrition information is for 1/3 of recipe and does not include honey or sweetener.