Heat the oil and add the cumin seeds. When they crackle, add the onion, garlic, green chiles, and sauté for 1 minute.
Add the turmeric powder, fenugreek and salt and stir.
Add the soaked moong dal and 1/2 cup of hot water.
Sprinkle the gram flour, mix well and bring to a boil. Simmer for some time.
Serve hot with rice or rotis.