Heat the oil in a nonstick pan.
When hot add the minced onions and saute well.
Stir it till onions become translucent.
Next, add the ginger-garlic paste and slit green chilies.
Now add tomatoes and combine well. Cook on high while you stir.
Simmer and add all the spice powders except garam masala.
Combine and let it simmer till the oil oozes out on the sides.
After 5 to 7 minutes, add the boiled chana and potatoes.
Mix well and let it cook with the masala.
Add water as required and bring to a boil.
Now add garam masala and adjust the salt
Add coriander leaves and mix well.
When the gravy is thick, switch off and serve with pooris.