Heat oil in a pan over medium heat.
Add cumin seeds and let them splutter.
Sauté finely chopped onions until golden brown.
Stir in ginger-garlic paste and cook for 2 minutes.
Add pureed tomatoes and cook until the oil separates.
Mix in coriander powder, turmeric, and salt.
Add the cooked chickpeas and stir well.
Pour in a cup of water and simmer for 10-15 minutes.
Stir in garam masala and slit green chilies.
Garnish with fresh cilantro before serving.