In a blender jar put all the ingredients as mentioned for curd mixture.
Blend to get a homogeneous curd mixture. Keep it aside.

Side by side boil drumsticks in water with salt and turmeric powder. Strain and keep aside.
Next heat a kadhai with oil. Splutter fenugreek seeds, mustard seeds and cumin seeds. Add dry red chillies and grated ginger.

Next add ginger garlic paste, little salt and turmeric powder. Put curry leaves and hing. Mix and cook for some time.
Next add the boiled drumsticks.

Mix and cook for some time till drumsticks combines well with the tempering.
Next add little water so as to reduce the temperature.
This helps to prevent curdling of the curd mixture.
Now add the prepared curd mixture and continuously keep stirring. Check the seasonings. Adjust as needed. Adjust the consistency by adding water.

As you get one or two boils in medium heat. Switch the flame off. Let it settle down for some time before serving.