Wash the pumpkin thoroughly, remove the seeds, and steam it.
Peel the cooked pumpkin and cut it into bite-sized pieces.
Soak soybeans (white soybeans) for about 6 hours, then boil and rinse them in cold water.
Blend the boiled soybeans with water until smooth.
Add the cooked pumpkin to the blended soy milk and blend again until smooth.
Strain the blended mixture through a sieve for a finer texture.
Add a little salt or honey as desired and mix well.
Serve chilled in a bowl.