In a pan add oil and let it heat a bit.
Once oil is a bit hot add cumin seeds, garlic cloves, green chilli and mix well.
Next add potatoes, saute and cook till edges are brown.
After the edges are brown reduce the flame to low add tomatoes, cover and cook them for 5 minutes.
After 5 minutes add turmeric powder, red chilli powder, coriander powder and mix well.
Next add spring onions, increase the flame to high and then mix well.
Next add salt, mix well till potatoes are cooked.
Next add garam masala powder mix well and serve.