Clean wash and soak the urad dal in enough water for at least 2 hours.
Drain the water and add the green chilli, black pepper, curry leaves, ginger, salt and blend till smooth.
Immerse both your hands in a bowlful of water and wet your hands well.
Take a portion of the batter and place it in a palm and lightly flatten it.
Using your index finger of the other hand make a hole in the center of the vada.
Transfer the vada on the fingers of the other hand and carefully slide it in hot oil.
Deep fry on a medium flame till it turns golden brown in colour from both the sides.
You can deep fry 2 - 3 vadas at a time.
Repeat with the remaining batter to make more medu vadas.
Drain on an absorbent paper.
Serve immediately with sambhar and coconut chutney.
