1Add ghee to a pan, then add the diced garlic and mustard seeds.
2Add the diced onions and salt, and sauté until cooked.
3Place the potatoes in a pot of water, add turmeric, and boil until cooked.
4Add the green chilies, tomatoes, tomato puree, curry powder, coriander powder, cumin, and chili powder to the onions in the pan, then add a small amount of turmeric water and let the spices cook through.
5Add the boiled potatoes to the spice mixture and cook for 5 minutes.