Add tomatoes and cashews with water in a mixie jar or blender and blend them to smooth paste.
3 Tomatoes, 2 tablespoon Cashews, ¼ cup Water
Heat oil in a pan on medium heat. Add cumin seeds and saute for a few seconds. To this, add green chilies and saute for a few seconds.
1 tablespoon Oil, 1 teaspoon Cumin seeds, 2 to 3 Green chilies
Then add the prepared tomato paste, chile powder, and salt and cook until the mixture bubbles for 3 to 5 minutes. Check out the detailed video here 1 teaspoon Red chile powder, Salt or Sendha Namak
Finally, add the boiled chickpeas, potatoes, 1 ½ cups of water (or aquafaba, i.e., water in which chickpeas were cooked), and bring it to a boil.
1 Medium Potato
Now simmer and continue to cook for another 8 to 10 minutes. This gravy thickens as it cools down. So adjust the consistency accordingly based on what you are serving it with.
Finally, add coriander leaves and mix. Switch off the flame.
2 tablespoon Coriander leaves