Boil Onions and tomatoes in water adding little javitri (Mace), 2 sticks of Cinnamon for 10 minutes and when cold make a purie of them. Don't throw the water.
Now in bowl put curd and all the powdered masala. Mix then well.
Heat 2 tbsp oil in a saucer pan, put onion-tomato puree and fry on slow fire. When oil leaves the side add ginger-garlic paste and fry for few minutes. Now add maslas mixed in curd and fry till oil leaves the side. Add aloo and mix well gently. Add water we used for boiling onions and tomatoes, and salt and bring one boil on high flame.
Now close the lid and cook for another 5 minutes.
Add chopped coriander and essence of kevra and mix well.