Blend the sweet corn kernels in a mixer till smooth. Transfer the sweet corn mixture into a bowl, add all the remaining ingredients along with ¼ cup of water and mix well to make a batter of dropping consistency. Heat a non-stick tava (griddle) and grease it using a little oil. Pour a spoonful of the batter on the tava (griddle) and move the spoon in a circular motion to make a 150 mm. (6”) round dosa. Smear a little oil around the edges and cook on a medium flame till the dosa turns light brown in colour from both the sides. Repeat with the remaining batter to make 3 more dosas. Serve immediately with coconut chutney or green chutney.