firstly, in a large bowl wash and soak 1 cup chana dal, 2 tbsp urad dal and 3 red chilli for 2 hours.
further, drain off the water and rest for 10 minutes. so that all water will be drained off.
transfer the dal to a blender and blend to coarse paste without adding any water. add just a tsp of water if required.
now transfer the coarse dal paste into large mixing bowl.
add in 1 green chilli, 1 inch ginger, ½ onion, few curry leaves, 3 tbsp coriander leaves, pinch of hing and salt to taste.
combine them well.
furthermore grease your hand with oil and prepare small balls, flatten the vada.
and deep fry in hot oil.
also stir occasionally till the vada turns golden and crisp.
finally, serve masala vada hot along with masala chai.