Pressure cook thoor dhal and mash well.
Heat Dalda & oil in a pan. Add cinnamon, ginger, garlic & green chilies and fry for few minutes. Add onions & tomatoes and fry for 5 minutes. Then add the boiled potatoes & coconut paste and fry well.
Mix the mashed thoor dhal with this and add turmeric, chili powder and salt. Add water if required. Let it boil for 5-10 minutes. Then add lemon juice according to your taste. Garnish with chopped coriander leaves.