Soak moong dal for 30 minutes, then drain and cook with water for 10 minutes until half cooked.
Add chopped cabbage, curry leaves, and turmeric powder to the dal and cook for another 10 minutes.
Meanwhile, blend grated coconut, cumin seeds, soaked rice, green chilies, and a little water to form a smooth paste.
Add the coconut paste and salt to the dal-cabbage mixture and cook for 10 minutes.
Heat oil or ghee in a small pan for tempering. Add mustard seeds and let them splutter.
Add urad dal, dried red chili, asafoetida, and curry leaves to the tempering and fry briefly.
Pour the tempering over the kootu, mix well, and serve hot with rice.