Soak the rice, fenugreek seeds and the lentils overnight. Grind to a slightly coarse paste. Add rest of the ingredients and mix well.
Heat oil in a pan and temper with the dry red chilies, mustard seeds and cumin seeds. Saute for a few seconds.
Add the curry leaves, asafoetida and sesame seeds. Saute for a few seconds more. Pour 2-3 ladleful of the batter and cook, covered on a low flame for 3-4 minutes or till it is nicely browned.
Flip it over and cook the other side too till done. Transfer to a serving plate. Garnish with grated coconut and coriander leaves.
Cut as desired and serve with mint chutney for a tea-time snack, appetizer, brunch or breakfast. They can also be relished as an after-school snack or as a lunch box meal.