Wash peel and chop potato in small pieces.
Grind tomato,green chilies and ginger and make a paste.
Heat oil in the pressure cooker and add mangodis and cumin seeds.
Fry till mangodis and cumin become golden.
Now add cloves ,asafoetida and whole red chilies and saute.
Add tomato puree in the cooker and fry for a minute.
Add all the dry spices and yogurt and saute till oil start separating from the masala.
Now add chopped potatoes and stir for a minute.
Add water and mix well.
Now pressure cook on medium heat till 4 whistles (or till potato cooked completely)
When it cool down then open and slightly mash the curry.
Give it a boil on medium heat (with out covering the pan)
Now add lemon juice and fresh coriander and serve hot.