Add semolina in a mixing bowl. Add cooking oil and boiled water and mix well. Cover and keep aside for 15 minutes.
In the meanwhile peel and grate potato. Mix ginger garlic paste, chopped coriander leaves, green chilli and all masale and mix. Transfer it in semolina bowl and knead a soft smooth dough.
Now take a portion of dough and roll it as a ball, press it and make a hole in the centre. Like wise make all the vadai.
Heat oil in a wok. Add vadai and deep fry till golden. Flip the side and fry from other side also.
Remove vadai from wok in a plate and serve hot with sauce or chutney.
