Transfer 1 & 3/4 cups of steamed corn kernels to a food processor, churn it with without any water until you get a smooth paste.
In a heavy bottomed pot, add vegetable stock/water and the prepared corn paste, mix well and heat for 2 minutes on medium heat.
Add remaining 1/4 cup of steamed corn kernels along with other chopped vegetables. Stir it well and bring to a boil. Cook for 5 minutes on medium heat, stirring occasionally.
Add salt, pepper & sugar, mix well.
Dilute the cornflour in 1/2 cup of cold water, reduce the heat and add to the soup stirring continuously until the soup has thickened.
Switch off the heat, transfer the soup in serving bowls, garnish with finely chopped scallion greens/spring onions along with some chilli vinegar, green/red chilly sauce & soy sauce on the side.