Heat sesame oil/nallenai in a thick bottomed pan, splutter mustard seeds.
Drop a pinch of fenugreek seeds/vendhayam and let it get heated up.
Add a spring curry leaves and let it fry
Before fenugreek seeds starts browning, add sliced shallots(small onions) and sliced garlic.
saute until it gets brown. Now add turmeric powder and sambar powder. If your sambar powder is not spicy, add little chilli powder as well. adjust spiciness according to your taste. Mix well and fry for a couple of minutes until powders are fried well in oil.
Add drumstick pieces and salt. Do not add too much, just for the flavour.
Pour in tamarind water/extract. For this soak tamarind in 2-3 cups of water. We are not going to add water and only tamarind water is added.
Add a pinch asafoetida and Let it boil in medium flame until it thickens and gets saucy.
Put off and serve with steamed rice and ghee!