First boil the tea leaf in 1 cup of water for few mins. Strain and keep aside
Take the soaked Chickpeas in a pressure cooker, add little salt, add the strained tea, and pressure cook for 3-4 whistles. Let the pressure release, take out the chickpeas and retain the water if any
Heat oil in a pan. Add the onion, chopped green chilly, ginger garlic paste and fry for 2 mins
Add the tomatoes and fry till it turns mushy.
Now add the powdered masalas and fry for 2 mins.
Add the cooked chole and mix well with the masalas and fry for few mins.
Add the retained water and add little water if required and cook for around 5 mins. Adjust the gravy consistency as required.
In a sauce pan heat 1 tsp oil. Add the cumin seeds and slit green chilly and let it sizzle.
Pour the tadka over the chana masala and cook for a min or two and take off the heat.