Black Chickpeas Curry/Kadala Curry

Ingredients
1.Black Chickpeas/Kadala/Bengal Gram       1 cup
Water                  2-21/2 cups
Onion(finely chopped)           1 large
Tomato(finely chopped)         1 large
Ginger chopped                     1/2 tsp
Garlic chopped                      1/2 tsp
Green chilly                           2 slit
Chilly powder                       1 tsp
Turmeric powder                   1/4 tsp
Coriander powder                 11/2 tsp
Salt                                       as needed
Garam masala                      1/4 tsp
2.Oil
Mustard seeds                  1/2 tsp
Curry leaves                  1 sprig
3.Coconut grated              1 cup
Water                             3/4 cup

Method
-Soak the Chickpeas/Kadala overnight or at least for 6-8 hours. 
-Pressure cook this with all the ingredients under (1),till cooked(5-6 whistles).Off the flame and wait till the pressure goes off.
-Meanwhile blend together coconut and water(3) into a smooth paste.Keep this aside.
-Heat a non stick pan add oil and splutter the mustard seeds,add the curry leaves and pour this into the cooked curry.
-Switch on the flame and add the coconut paste and mix well.Let it boil for 2 minutes.
-Serve with puttu or Appams.