Thuvar dhal - 200 gms.

Water - 2 cups.

Tamarind - 1 lemon sized ball

Salt - 2 tsps.

Sambar powder - 3 tsps.

Onion - 100 gms.

Tumeric powder - 1/4 tsp.

Step 1:First of all chop the onion into small pieces

Step 2:Immerse the dhal in 1 cup of water,add tumeric powder to it and cook in a pressure cooker for 15 minutes.

Step 3:Now,soak the tamarind in hot water (1 cup) for 1/2 an hour.

Step 4:Then ,dissolve the tamarind in the water and filter the residue like mud,seeds etc.

Step 5:Add 2 cups of water to the filtered tamarind water and mix well.

Step 6:Heat oil in a pan,add mustard seeds until they sputter.

Step 7:Then add the chop onions into the same pan and fry for 5 minutes.

Step 8:Add this mixture to the tamarind water and add salt ,sambar powder and mix well.

Step 9:Boil this mixture for 20 minutes.

Step 10:Then add the cooked dhal into it and boil for 10 minutes.

Step 11:Serve hot with plain rice.