Once you have chopped up all the ingredients, add the mustard seeds to some heated oil

Once the seeds start to pop add the cumin seeds, the ginger and garlic pastes and the green chillies

Give it 30seconds and add the onions and sauté until the onions are soft

The garam masala, tumer powder, coriander powder and the chilli powder go in next

Cook until the raw smell of the masala powders disappears

Add the tomatoes and potatoes and the required amount of salt

Mix well, put the lid on and cook on medium-low heat until the potatoes are cook through

The spring onions do not take a long time to cook, so when you see the potatoes are almost cooked, add the spring onions and cook until it is soft, or you can choose to cook it half way and leave it crunchy

Serve immediately!