Clean and soak yellow lentil in water for 3 hours. Drain the water completely and grind it to make a batter. Do not add water while grinding.
Transfer the batter into a bowl, add salt to taste, red chilli powder, chopped onion, green chilli, chopped coriander, asafoetida and mix well.
Heat some oil in a frying pan. Make sure to check if oil is ready. You can check by dropping a small portion of the batter in the hot oil and if it immediately comes on top, oil is ready.
Take a small portion of batter in your hands and drop it into the oil carefully. You can also use a spoon to drop the batter into the hot oil.
Deep fry in oil on low-medium flame till it turns golden brown. Drain excess oil. Enjoy for snacking.