when cooled, grind to a fine paste with some water along with grated coconut.
preparing the sambar
pressure cook tuvar dal with 2.5 cups water with a pinch of turmeric, in 2 or 3 cups water.
when the dal is cooked and soft, mash the dal with a wired whisk or a spoon.
keep aside.
in another pan, mix the chopped veggies, 1.5 or 2 cups water, turmeric powder, salt and cook till the veggies are almost done.
add the mashed dal to the veggies.
stir and add the tamarind pulp followed by the sambar masala paste.
if required you can add some water.
add the jaggery also and stir.
simmer for some 10-12 minutes or more, till the raw aroma of the tamarind has disappeared and the whole flavors in the sambar have merged with each other.
taste and if required add salt.
preparing the tempering
heat oil.
first splutter the mustard seeds.
then add the red chilies, curry leaves and asafoetida.
fry for some seconds and pour the tempering mixture in the sambar.
cover the sambar pan with a lid for a few minutes, so that the tempering flavors gets mixed with the sambar.
serve the udipi sambar with idli, dosa or steamed rice.