Take all the ingredients given for pressure cooker in a cooker, Cover and pressure cook for 3 whistle, simmer the flame and cook for another 10 mins. Turn off the heat and let the pressure go all by itself. Open the cooker and Cool it bit. ..Mash it roughly. you can take it in a blender and coarsely blend it.
Heat ghee in a pan, add ginger, garlic and chillies and fry for a min.
Add in onions and fry till golden. Add in tomatoes and mix well.
Add in the pureed mix and cook for 15 to 20 mins on low flame.
When serving, dollop with some homemade butter on top and serve.