Heat the ghee in a pan and add cumin seeds.

Now add green chillies and ginger and stir for a few seconds. Do not let it brown.

Sprinkle red chilli powder and give a quick stir.

Add tomatoes and cook on high heat for 3 mins. Add potatoes along with rock salt and toss them together.

Cook for 5mins and then sprinkle with chopped coriander.

Add the lemon juice, toss and remove.