Next morning cook the chanaa with water & salt in a pressure cooker, after first whistle lower the flame. Switch off the gas after 3-4 whistles
Puree the tomatoes in the mixer
In a pan heat oil and add Cumin, after 30 seconds when the cumin is brown, add Coriander powder and after 20 seconds add red chilli powder
Add tomato puree to the above and cook till the you can see the oil on the sides of the pan
Open the pressure cooker and if the chanaa is cooked and add the above masala, and pressure cook it for one or two whistles. If the water in the chanaa is not enough add more
Open the pressure cooke and boil it , till it is almost dry