Paruppu Rasam

Ingredients
Tomato - 1 small size
Tamarind - 1 small ball (or 1 tblsp thick extract)
Coriander leaves - 1 tblsp
Turmeric powder - 1/4 tsp
Pepper Powder - 1/2 tsp
Jeera Powder - 1/2 tsp
Dhaniya powder - 1/2 tsp
Garlic - 3 pods crushed
Salt
Water - 3 cups
Thoor dal - 1 tblsp

To Temper 
Oil - tblsp
Dry chilli- 2 Nos
Curry Leaves - 1 spring
Mustard - 1 tsp

Preparation
Cook the dal and mash it. Extract tamarind juice and mix all ingredients well.
Heat oil and temper the items under To Temper and then pour the mix, close the vessel and allow to cook. when its about to boil switch off the stove. Rasam should not boil.

Note
You can try boiling rasam. In that case add pepper and jeera powder at end that is after you switch off  the stove.