This is a quick and easy recipe from my mother-in-law. As the name suggests (Pachi=raw; pulusu=soup), there is very little cooking involved in this dish. It tastes awesome with vuthi pappu (plain dal).
Add water to tamarind paste and bring to a consistency of your liking. Add chopped onions, green chilies, sugar, salt and sesame seeds powder. Mix well (you might want to use your hand to get uniform consistency).
Heat 1 tsp oil in a pan, add the seeds and curry leaves. Add this to the pulusu and serve with rice and dal.