Heat 1 tsp coconut oil in a pan.
Add udad dal, chana dal and dry red chillies.
Saute for 2 to 3 minutes.
Now, add sliced onions.
Sprinkle some salt over the onions.Adding salt to the onions fastens the cooking process.
Saute on low flame till the onions turn soft and translucent.
Once the onions are cooked, turn off the heat.
Allow the onions to cool completely.
Transfer the onions to a blender jar.
Add garlic and tamarind.
Add little water and blend to a smooth paste.
Heat 1 tsp coconut oil in a small pan.
Add udad dal.
When it starts spluttering, add the mustard seeds and curry leaves.
When the mustard seeds start crackling, pour this seasoning into the onion chutney.
Onion chutney is ready to be served.