Blend half the roasted corn to make a fine paste and coarsely grind the other half.
Heat oil in a pan. Now add chopped garlic cloves and saute for a few seconds. When garlic turns golden in colour, add cumin seeds and coriander seeds. Saute for 15 seconds. Now add ginger, coriander leaves, turmeric and refined flour. Cook for another 2 mins till the colour changes to golden.
Now add water (approx. 100 ml) to the pan. Cook for another minute and stir continuously to prevent lumps. Strain the mixture into another pan and discard the residue.
Now add both, pureed and coarsely grounded corn to the pan with flour mixture. Add water to adjust consistency as per need, bring to a boil and simmer for a few minutes.
Adjust salt and add black pepper powder as per taste. Serve hot with toast or sauteed veggies on the side.