Now filter the tamarind extract and add to the kadai. Mix well. Let it come to boil.
Now add 1 tbsp. Sambar powder, 1/4 tsp turmeric powder, 1 tsp chili powder, 2 pinch hing and Salt to Taste. Mix well. Taste for salt and adjust accordingly.
Let the gravy simmer for 10 minutes. Stir occasionally
In meanwhile, lets prepare rice flour slurry.
Make a paste of 1 tbsp rice flour and 4 tbsp water.
Add this paste to the gravy. Mix well and let it simmer.
After 5 minutes, turn off flame. Vendakkai Vatha Kozhambu is ready!
My mother’s trick is to add 1-2 tsp sesame oil now. It will give a nice flavor and shine for the kozhambu.