Karupu Ulundu (Black Urad Dhal) & Kollu (Horse gram) vada is a variation from the regular Medu vadai. Urad dal is good for women as it has iron, folic acid, calcium, magnesium, potassium which makes it a healthy pulse. Horse gram is the most protein-rich lentil found on the planet. It is very high-powered. That’s why race horses are fed with this gram, which is called horse gram in the market.
Soak Black Urad dhal and Kollu separately for 4 hrs.
Strain the water from Urad dhal and Grind until fluffy. You may sprinkle water if needed but it should finally come like a butter.
Strain the water from kollu ,add salt & Grind it.
Grind until kollu is little coarse or you may wish to grind as a paste also. I prefer to keep a bit coarse so that the vada turns to be crispy.
Add onion, green chili , ginger, curry leaves to the batter.
Keep a small container with water. Soak your hands.Take the batter and make them as a ball. The batter should not stick to your hand. This is the right consistency.
Make a hole to the batter ball and deep fry in oil.
Fry until the ‘ssssshhh’ sound stops flipping in between.