Take all the ingredients listed under ‘to soak’ in a mixing bowl, soak it in water till immersing level. Soak for atleast 3-4 hrs. Drain water and set aside.
Clean drumstick leaves, separate from stem, rinse it well and set aside.
Grind red chillies, fennel seeds along with soaked dal to a slightly coarse paste, add a pinch of hing, mix and set aside.
Saute drumstick leaves till it shrinks.
Add it along with chopped onion , turmeric powder to the batter, add little water and mix well.
Add required salt. The batter should be slightly runny in between idli and dosa batter consistency.
Heat the dosa pan, grease with little oil, pour a ladle full of batter and spread it evenly a bit thick.
Drizzle oil over the sides and let it cook, flip over other side and cook till golden brown and crisp at the edges.
Serve Murungai Keerai Adai hot with any chutney of your choice.