Sprout the green gram by soaking in water and then next day drain the water. Keep it covered in a big strainer or muslin cloth. On next day sprouts will start appearing. You can remove the peel of sprouted green gram by rubbing it against each other with your hands.
Boil the sprouted green gram by adding 2 cups water. Drain and retain the water. This water can be later added to gravy.
Grind the grated coconut, coriander seeds, turmeric powder, red chilies, tamarind and peppercorns to a paste.
Heat a kadai and pour the gravy in it. To this add the sprouted green gram. Add 3/4th cup water specially the one retained after pressure cooking the green gram to make the gravy thin.
Add grated jaggery and stir well.
Simmer for 10 minutes and switch off the gas.
In a tempering pan, add 1 teaspoon oil. When oil gets heated add mustard seeds. When mustard seeds flutter add asafoetida and curry leaves. Add this tempering to the sprouted green gram curry and cover the kadai.