Set the tamarind, turmeric powder, and salt to boil in about ¾ to 1 liter water
While that’s going, roast the dal, chillies, and hing in 1 tablespoon sesame oil until the dal turns fragrant and golden-brown
Tip this into the simmering tamarind water
Add the rasam powder and jaggery
Simmer this mixture until the dals have cooked, the raw tamarind smell has dissipated, and the rasam is deepening in color.
In 2 tablespoons ghee, fry the dried pavazhamalli or parijaat flowers gently until they are several shades darker—a minute or two will do. Take care not to let them burn.
Pour this into the simmering rasam
Serve hot with a nice soft table rice like thooyamalli or khichli samba