- In a kadhai.Add oil when hot add mustard seeds,jeera and hing When it crackles add onion.When it is translucent add ginger garlic paste. Cook for 5mins add boiled potato give it a stir add salt cook for 2 mins.Garnish with coriander leaves.Now it is ready.Serve with puri Now add tomato cook for 2mins add all the spices.