Soak the tamarind for 15 minutes in some warm water. Now strain the water in a separate bowl by removing the pulp.
Heat 1 tsp oil in a frying pan and add Manathakkali Vatthal. Saute them for a minute on low flame, remove from the pan and keep it aside in a bowl.
Heat 1 tbsp oil in the same pan and add mustard seeds. When they crackle, add fenugreek seeds and asafoetida, red chillies and curry leaves and saute for few seconds.
Add manathakkali, salt to taste, 1 cup of water, grated jaggery and bring it to boil.