Pressure cook the masoor dal adding 3 cups of water for 2-3 whistles.
Heat oil or ghee in a Kadai and add the cumin and let them splutter.
Then add asafetida, minced ginger-garlic, chopped green chili, curry leaves, and saute for 15 seconds
Next, add the onions and saute till the onions turn light brown in color.
Add tomatoes and all the spice powders – turmeric powder, red chili powder, coriander powder, and garam masala powder and cook till tomatoes turn soft, which takes 2-3 minutes.
Now add the cooked and mashed dal (lentils), and stir well. Add water to adjust consistency and salt to taste. Boil dal for 2-3 minutes on a medium-low flame. Finally, add lemon juice and chopped coriander leaves. Mix well and serve hot.