- Boil or steam the potatoes till they are just cooked. They should not fall apart. Peel the potatoes and dice them. Heat oil in a pan. Crackle the mustard seeds first. Then add the curry leaves and saute for a few seconds. Add the diced potatoes and stir. Sprinkle all the spice powders, asafoetida and salt. Stir well, so that the masala coats the potatoes well. Saute for 5 to 6 mins on a low flame. Keep on turning at intervals to ensure even crisping and roasting of the potatoes. You can also garnish the roasted potatoes with coriander leaves (if you prefer).