Finely grind fennel seeds and dry red chilli. Add garlic and churn with the dry powder.
Add this paste to the soaked rice and dhall and coarsely grind coarsely this mixture with very little water keeping the consistency thicker than dosa batter.
Add finely chopped onions, coriander leaves, curry leaves and salt.
Mix well and add water if needed.
Heat the tawa and pour a ladle full of batter and spread evenly to make a thick adai.
Drizzle oil and flip it to the other side once it is cooked on one side.. Do this until both sides are golden brown.