Peel the potatoes and prick them lightly .
Boil the potatoes with salt and turmeric powder.
Once the potatoes are cooked drain the water and keep them aside.
Heat 2 tbsp oil.
Add mustard seeds , asafoetida and whole red chilly .
Add onions , ginger garlic paste and green chilly .
Sauté onions till light pink and add tomatoes .
Cook till mushy .
Add the dry spices and boiled potatoes .
Mix well and add water to make the gravy .
Make sure you do not make the gravy very runny , it should be on the thicker side .