Heat oil in a pan.

Add finely chopped onion and fry till soft then add the tumeric and tomatoes and fry till tomatoes r mushy.

Add the tomato paste,salt and red chilli and fry a little more.

Now add the dhal and a little water and let it boil for 10 mins.

Then add the coconut milk and let it boil some more till curry thickens.

Garnish with coriander.