Heat oil in a pan or a kadai.
Fry the chopped ginger with a little salt, till it turns golden brown.
Remove it from the oil and keep it aside once done.
Heat up the remaining oil in the pan.
Splutter mustard seeds.
Add coconut pieces and fry them.
Once it turns a little brown, add curry leaves and fry it.
Add the chopped onions and green chillies and fry, till it turns brown.
Add turmeric powder, coriander powder and chilly powder, till the raw smell is gone.
Add the fried ginger and tamarind water.
Lower the flame and allow it to boil.
Add the jaggery juice and keep it for 5 mins.