Take 1 tablespoon tamarind in a bowl. Add little hot water to it. Set aside for 10-15 mins.
Then crush with hands and set aside.
Peel the skin from ginger rinse well then cut into small piecs.To a kadai add 1 tablespoon oil add 1/2 cup ginger(chopped) and 4 pieces garlic.
Saute in low flame for 2-3 minutes.
Transfer to a plate and set aside.
Now to the same kadai add 1 tablespoon whole urad dal, 1 tablespoon chana dal.
Roast until golden.
Now add 10 pieces red chillies.
Roast until red chillies are roasted well and by then dals would have turned golden brown. Switch off.
Now transfer to a plate and set aside.
Cool the roasted items completely.
Transfer it to a mixer jar.
Add tamarind pulp, discard the fiber if any.
Add salt to taste and 1 heaped teaspoon jaggery powder.
Add little water and grind it to chutney consistency.
Rinse mixer with little water and add it to adjust consistency of the chutney.
Mix it well. Set aside.
For tadka : Heat 2 teaspoon oil - add 1 teaspoon mustard seeds let it crackle, then add few curry leaves and a pinch of hing.
Transfer tadka to chutney.
Mix well and ginger chutney is ready.