Wash the pulses in running water & soak them for about 6-8 hrs
Drain & sprout them using a sprout maker or in a colander, covered with a lid.
Pressure cook pulses with a bit of salt until soft yet firm using 3 glasses of water.
Drain the water for later use & set aside the pulses.
In a pan, dry roast red chilies, coriander seeds & cinnamon until aromatic.
Grind them with coconut, chopped onion & tomato, turmeric along with a tbsp of cooked pulses using very little water into a smooth paste
In a pot, add the water that was set aside & bring it to a boil. Add the ground paste, salt & 2 tbsp of cooked pulsed & simmer for about 10 mins. Add 2 more glasses of water as you simmer to get a Rasam like consistency.
Temper with Desi Ghee, mustard seeds, curry leaves & Hing. Pour this over the Rasam/Saaru. Cover & set aside
To Make Usli:
In a Kadhai, heat oil & splutter mustard & cumin seeds. Add Hing & curry leaves & saute for 10 secs. Add cooked pulses, grated coconut, Salt as per taste. Mix well.
Turn off the stove & Add Lemon juice & mix again. Garnish with fresh chopped coriander
Serve Hot Rasam & Usli along with some steamed Rice or even Ragi Mudde (Finger Millet Dumplings)
Notes
It is not mandatory to sprout the pulses. You may soak them for about 2 hrs & make this but sprouting them definitely adds to its nutritional value.