Saravana bhavan style tiffin sambar

Ingredients

Cooked toor dal       : 3/4 cup
Small Onion            : 8 to 10 nos  
Tomato                    : 1 
Carrot                      : 1
Tamarind water       : 1/4 cup 
Red chilly                : 2 nos
Salt
Coriander leaves
Mustard seeds
Curry leaves
Oil

To grind

Coconut    : 1 1/2 tbsp
Tomato     : 1
Fried gram dal   : 1 tbsp
Sambar powder  : 2 tsps 

Method

Chop the onion ,carrot,tomato and keep aside. 
Heat oil in a kadai, add mustard seeds, broken red chilly, curry leaves and fry. 
Add carrot ,tomato and fry for few minutes.
Add salt, sprinkle little water and let the carrot cook until soft.
Grind all the ingredients mentioned under 'to grind' to a fine paste and keep aside.

Add tamarind water ,coconut paste,cooked dal and mix everything well.

Let the sambar boil for 5 to 8 minutes.

Garnish with coriander leaves and serve hot.