Take sweet corn in a pan along with a cup of water. Let it boil for a minute. Switch off the flame. Strain the boiled corn to drain off all moisture.
Next, in a mixer coarsely grind boiled corn, salt, green chillies and cumin seeds together. Do not add any water. Transfer it over a boil and mix with chopped greens.
Next add 1 cup of water, salt to a pan and bring this to rolling boil. Include rice powder and mix well.
While stirring, ensure that no lumps are formed and switch off. When it is warm to handle, knead crackless dough. Divide it in to 8 equal portions and roll as ball.
Take a rice ball and roll it in to 3" disc using rolling pin. Dust some flour while rolling. Add two teaspoons of corn stuffing, fold and seal the edge. Continue this process with all the rice balls.
Steam cook thus prepared dumplings for about 15 minutes.
Khara kadubu with savory corn filling is ready to offer to Lord Ganesha.