In a wok, heat oil and add jeera.

Once it splutters, add the potatoes and just enough water that covers it.

Turn the gas to medium heat.

Cover and cook until the potatoes are par boiled. [Half boiled.

Add the seasonings [except jaggery]  and tomatoes.

Cover and cook for about 4-5 min. [You might need to add some more water.

Add the methi leaves and cook for another 5 min.

Add the jaggery and adjust the seasonings if need be.