If you plan to cook the mung bean soup in a regular pot, then the first step is to soak it in clean water for around 1 to 2 hours. Drain and set aside. Soaking will save you lots of time on a regular pot.
Then add mung bean with sugar, water, or other ingredients like pumpkin in a pot. I will recommend using a half-cooking half resting method just like cooking other beans and boba pearls. This can save lots of energy. To do this, so start the fire first and then bring the content to boiling, and heat for 10 minutes. Turn off the fire, cover it, and rest for 20 minutes, and then restart the fire to cook until the beans are completely soft. You do need to simmer it for 1 hour or even longer.
Instant pot method
The instant pot method is much easier, simply add sugar, mung beans, and pumpkin if using, and water and cook with bean or soup pressure. Let the pot stay in the cooker for 20 minutes and transfer out. Add a pinch of salt to balance the taste and wait for the soup to cool down naturally.
How to serve
You can serve directly or fridge for 4 hours for a cold summer version.
Mung bean soup can be served directly or you can choose to add coconut milk and sago.