Heat a pan with oil, temper with mustard seeds. Once it splutters, add curry leaves, hing and saute.
Next add the chopped green chillis, and saute.
Add the chopped orange peel and combine well.
Cook for few minutes, next add turmeric, salt and mix well.
Now add tamarind paste and 1/2 cup water.
Let it simmer for 5 minutes, next add jaggery and let it melt.
Cook and let the orange peels soften.
Simmer till the jaggery melts. Turn off the heat.
Add roasted sesame powder and mix well.
Cover and let the pachadi rest for 5 minutes.
Check the consistency and water, if needed.
Taste and salt or jaggery to balance the tastes.