Cooling mung bean soup dessert is a refreshing, naturally sweet summer treat. A family recipe with gentle, clean flavor and soothing properties.
Rinse mung beans in several changes of cold water, removing any impurities or floating skins.
Place mung beans in a saucepan with 7 cups of water and bring to a gentle boil over medium-high heat.
Reduce the heat to low to maintain a steady simmer. Skim off any foam, partially cover, and cook for 40–50 minutes until beans are tender but skins not disintegrated.
Add rock sugar and salt, stirring gently until the sugar completely dissolves. Simmer 5 more minutes, tasting for sweetness.
Turn off the heat, let cool to room temperature, then refrigerate until well chilled. Serve cold, optionally with some of the clear broth ladled on top of each bowl.