Heat oil in a karahi and put cumin seeds and Peanuts and when cumin seeds splutter put grated ginger and garlic and stir for two minutes. Now Add tomato puree and chopped green chilli and cook till oil leaves the karahi. Now add, salt, red chilli powder, turmeric powder, mango powder and coriander seeds powder and mix well. Add chopped potatoes and stir. Sauté for 2 minutes.