Heat oil in a pan over medium heat. Add cumin seeds and when it crackles add ginger and green chilli, stir-fry for a minute. Add green peas, potatoes and stir fry till for 2 minutes.
Add red chilli powder, turmeric powder, and coriander powder and stir-fry at slow heat till the spices blend well with the vegetables.
Add salt and Garam masala and finish with chopped coriander leaves.