In a mixer, take the chopped tomatoes, ginger, green chillies and grind to a smooth paste. Keep aside.
Heat a pressure cooker with cooking oil. Add hing, cumin seeds and let it crackle.
Next, add all the spice powders, stir well to mix everything. Add little water to ensure the spices don't get burnt.
Now add tomato puree and combine well.
Cook until everything combines and gets cooked well, and you see oil coming out on the sides.
Next, add cubed potatoes, stir well.
Add salt and water for the gravy. Mix everything and close with a lid. Pressure cook for 3 whistles. Let the pressure fall.
You can mash few potato pieces to make the gravy thicker.
Add fresh coriander leaves
Serve this Tamatar Aloo ki Sabzi with besan ki masala pooris.