soak 1 cup of black urad dal in enough water for 5-6 hours.
Then remove soaked dal water with a strainer.
Now add dal into a mixer jar and grind into a coarse paste without adding water into the batter. keep it aside.
Also in a mixture jar, add green chilli, ginger, and green garlic. Grind it into a paste. Keep it aside.
Take out grinded mixer into a bowl and stir continuously in one direction after a few minutes mixer is light and fluffy.
Then add chili-garlic-ginger paste, chopped methi leaves, coriander leaves, hing, ajwain, turmeric powder, red chili powder, coriander powder, and salt. mix well.
Now, grease your palm with oil and make round disc shape vada. You can also make vada on wet cotton cloth.
Heat oil in a pan, add vada and deep-fried on medium flame.
Take out fried vada on a wire rack or tissue paper and serve with green chutney.