In a pot, add oil. Once hot , add cumin seeds. Once they splutter, add bay leaf and cloves. Once they start to get fragrant, add onion paste and saute for few minutes. Turn off the heat.
Now add this mixture in slow cooker along with tomato puree, chickpeas, salt, ginger paste, garlic paste, coriander powder, red chili powder and water. Turn the slow cooker to high, cover and set it for 5-6 hours.
Once done and ready, add garam masala. Stir and taste and adjust seasoning as per taste.
Garnish with some finely chopped coriander and serve.
Recipe by Naive Cook Cooks at https://www.naivecookcooks.com/slow-cooker-chana-masala/