Wash chana dal with water and soak it for 1 hour in a bowl.
After one hour ,drain the water completely and separate into plate.
Take small mixie jar , add the peeled garlic, dried red chilli , fennel seeds ,salt and 2tblp of drained chana dal. Grind together coarsely by mixing in between without adding add any water.Check the dal is binding together in you palm.Transfer to wide bowl. Now ,add the remaining drained chana dal , grind it coarsely without adding water.Like pulse it a few time to get coarse dal.
Collect all the grinded dal in wide bowl and then add finely chopped onion,coriander leaves,curry leaves. Give nice mix together.
Taste for salt and spice level and adjust accordingly.
Make small balls and flatten it to a good vada shape in your palm and smooth the edges.
On medium flame ,heat oil in deep pan .
Divide the vada dough into desired numbers .Medium you can make 12 numbers.
Check oil is hot enough by gently dropping small portion of vada dough to the oil.
The dough must rise without resting on the bottom of the oil.
In good hot oil , gently slide the vada one by one
Makesure ,the dough is having enough space to cook without overlapping.
Cook vada o both sides till golden brown color and drain on paper towel
Serve hot vada for lunch time along with rasam ,variety rice or as evening snack.