In a cooker add oil and let it heat a bit.
Once hot add parwal, potatoes and fry for some time.
Once cooked a bit take it out in a plate.
In the same oil add bay leaf, cinnamon stick, big cardamom, cloves, black pepper corn, cumin seeds, onion and cook till onion is golden brown.
Next add crushed garlic cloves & ginger and cook again.
Once onion is golden brown add tomatoes, salt mix well and cook till tomatoes are soft.
Next add turmeric powder, chili powder, coriander powder mix wand cook for a minute.
Next add water mix well and cook the masala in it.
Once masala is cooked add fried parwal and potatoes and cook for 2 minutes.
After 2 minutes add water mix well, cover with lid and cook till 2 whistles on high flame.
After 2 whistles turn off the heat and remove the lid o0nce cooker is cool.
Add garam masala, coriander leaves and mix well.