First, wash toor dal
furthermore, add water and soak for 1 hour
Add soaked dal + water, turmeric powder, sesame oil, onion, tomato, garlic and green chillies; pressure cook for 5 whistles
Simmer and cook for 1 minute. Turn off the stove
do natural pressure release
Furthermore, add tamarind water and required salt; boil for 10 mins
add oil and heat
when oil turns hot, add mustard seeds, fenugreek seeds, cumin seeds, green chilli, red chilli, curry leaves and asafoetida; splutter
Furthermore, add onion and saute till onion turns translucent
add it to the sambar
furthermore, add coriander leaves and boil for 5 minutes; instant sambar ready