firstly, in a large mixing bowl take 1 cup sour curd and ¼ cup besan.
also add ½ tsp turmeric and ½ tsp chilli powder.
whisk smooth.
additionally add 3 cup water and whisk well.
pour the besan mixture into large kadai keeping flame on low.
keeping the flame on low, stir for 5 minutes.
once the kadhi comes to a boil add in 1 green chilli and ¾ tsp salt. mix well.
continue to boil for 15-20 minutes on medium flame stirring occasionally.
now prepare the tempering by heating 2 tbsp oil.
once the oil turns hot, add in 1 tsp mustard, ½ tsp cumin, ¼ tsp methi, pinch of hing, few curry leaves and 2 dried red chilli.
also add ¼ tsp turmeric and ¼ tsp chilli powder. allow to splutter.
now pour the tempering over kadhi.
also add 2 tbsp coriander leaves and mix well.
finally serve dahi kadhi with hot steamed rice or roti.