- soak green moong and chana dal in a bowl for 4-5 hours. Grind to a coarse paste along with green chilies, salt, ginger, garlic, and mint leaves. Avoid adding water while grinding and do not grind it to a soft paste. Transfer to a mixing bowl and add finely chopped onions, curry leaves, cilantro, and mix well. Heat oil in a frying pan over medium flame. Using a polythene cover or your palm. Spread a little amount of batter and make a hole in between. When the oil is hot, slowly slide vada in it; add 3-4 vadas at a time. Flip and deep-fry both sides until they turn lightly golden brown and crisp. Drain excess oil and transfer them over kitchen paper. Serve hot.