Boil the potatoes in pressure cooker on medium flame for 1 whistle, depressurise, discard water and peel the potatoes, set aside

In a wok heat mustard oil, add potatoes, salt and turmeric powder and on medium flame fry, set aside

In the same oil add cumin seeds, hing or asafoetida and stir for 30 seconds, add ginger paste, tomato paste and cook on medium flame till oil surfaces.

Add fried potatoes, stir and combine well, add chaat masala, tamarind pulp, black salt, chopped green chillies and mix well.

Check seasoning once, add chopped coriander leaves