First, add tomatoes and tamarind water; squeeze well and extract the juice

filter and save the tomato residue

furthermore, add water and squeeze again

Squeeze well again  and extract the tomato-tamarind water

Furthermore, add coriander leaves, turmeric powder, required salt, and green chilli; boil for 10 minutes

meanwhile pulse garlic, pepper, and cumin seeds; keep aside

cook till the raw smell goes off and the green chilli turns soft

add pulsed mixture; mix well and bring to a frothy boil

turn off the stove

add oil and heat

furthermore add mustard seeds, urad dal, red chilli, and curry leaves; splutter

add asafoetida and mix well

transfer and mix well

serve hot