Soak all lentils – toor dal, moong dal, chana dal, urad dal, raw rice, dried red chillies and ginger in enough water for 5-6 hours or overnight.
Grind this into a smooth batter with water as needed. Remove this onto a container.
Meanwhile dry roast oats and poha/flattened rice until it is golden and fragrant. Let it cool down completely. Grind into a smooth powder.
Add this ground powder into the batter prepared. Mix well. Add extra water if needed.
Add black pepper powder, jeera powder, salt and asafoetida. Mix well.
The adai batter should be thick. No fermentation needed before adai is needed.
Heat a flat pan or cast iron tawa. Pour a ladleful of batter and spread it into a thick roundel. Make a hole in the center. Drizzle coconut oil all around.
Cook on low flame until the bottom is golden. Gently flip it to the other side and cook for a few seconds. Remove from the tawa.
Serve hot with coconut chutney or any spicy chutney of your choice.