Cook dal with enough water and a pinch of turmeric powder
In a heavy-bottomed pan add ghee and heat
Add banana pepper and saute till slightly changed brown
add tomatoes and green Chilli; saute for 1 minute
Furthmore, add turmeric powder and salt; saute for 2 minutes or till tomatoes turn mushy
Add 2 cups of water and boil Boil for 12-15 minutes till raw smell goes off
Furthermore, add cooked dal and 1/4 cup of water, mix well
Sprinkle chopped coriander leaves, curry leaves, a pinch of jaggery, and ginger powder; mix well and cook till the rasam becomes frothy
Add lemon juice and mix well
In a small pan add ghee when the ghee is hot add mustard seeds and cumin seeds; let it splutter
Add asafoetida and mix well; transfer to the rasam