Ingredients:

Ginger

Green chilly

Tamarind Juice

Jaggery

Turmeric powder

Chilli powder

Jaggery

Mustard seeds

Curry leaves 

Method:

Heat the pan and add coconut oil.Splutter mustard seeds and curry leaves.To this add very finely chopped ginger and thinly sliced green chillies.Once fried nicely,add tamarind juice(a day before-to a big lemon size tamarind,add enough water and keep it aside.Take out the pulp and sieve it).Add 1/2 tsp turmeric powder and 1teaspoon chilly powder.Mix it well.To this paste,add two pieces of jaggery and leave the paste to thicken.Check the taste and adjust the sourness by adding little jaggery.Stirwell till the paste thickens.Once the paste thickened it's ready to be served.