Clean leaves and soak in a bowl of water for 5 minutes till the dirt settles down at the bottom. Then remove from water and wash thoroughly. Chop finely.
Heat oil in a pan. Add cumin seeds and let it crackle. Add ginger and garlic and saute till it leaves pungent smell. Add onion, green chillies and saute for 2 minutes till translucent.
Dice the potatoes (boiled or raw). If using raw potato then saute on low flame and covered with a lid for some time till potatoes are cooked soft upto 80%. Add salt. This will fasten the process by releasing water which will help in cooking faster. If using boiled potatoes then saute for 1 minute on high flame.
Add coriander powder, red chili powder, and turmeric powder and mix well. Saute for another 1 - 2 minutes on low flame.
Add chopped methi leaves and toss to mix everything well. Cook on low flame for 5 - 7 minutes or till leaves are cooked completely.
Stir in between to avoid sticking at the bottom. Turn off heat once leaves are cooked completely.
Drizzle some lemon juice and add finely chopped coriander leaves.