Ingredients:

2 Tomatoes chopped
1/2 cup cooked thur dal
2 Green chilles chopped
1 small piece Ginger
1 pinch asafetida
Coriander leaves-freshly chopped
1 tsp red Chilly powder
1/2 sp Black Pepper powder
1/2 sp Turmeric powder
1/2 sp cumin powder
1 so Mustard seed
2 Red chilluy
1 tsp ghee
Salt to taste

Method:

Take about 4 cups water ,add chopped tomatoes to it and allow it to cook.
Put salt ,turmeric powder and chilly powder.
Cover it with a lid and reduce the heat and let it boil for 5 min.
Now add asafetida, cooked dal, ginger, green chilly, pepper powder and jeera powder.
And cook it for about 15 more mins.
In a pan pour 1 tsp ghee add mustard seeds with red chilly and make seasoning.
Add it to the rasam and cook in high heat for about a minute or two.
Now garnish it with freshly chopped coriander leaves.
Your 'Tomato Rasam' is ready to serve.
Serve with hot rice.

Note: it is very soft rasam, so you can drink it like soup also.