Put dal and rice in water and leave it for 5 hrs.
Drain it and grind to make a paste.
Grind peppercorn separately and mix it in the dal-rice paste.
Now add chopped onion, green chilies and salt and make it like a batter.
Heat the oil in pan.
Take small portions of the batter, in ball-like shape and deep-fry them.
Fry the balls, till they turn golden brown.
Medu Vada is ready!