Batatyache sawng

Udipi Shrikrishna by Shri Rama nayak  This udipi hotel is just outside  Matunga Railway Station. It's a 'thali' restaurant , limited and unlimited. I have the recipe of this veggie from the book 'Saraswat Swayampak' by Shalini Nadkarni. It's really simple and tasty too.

Ingredients
2 boiled potatoes ( peel off the skin and cut into small cubes)
1 onion ( cut into thin slices)
2 dry red chilies
2 tsp tamarind paste
salt to taste

Tempering
1 tsp coconut oil
1/2 tsp udid dal
1/2 tsp mustard seeds

Method
Soak red chili(remove seeds) and tamarind paste in lukewarm water for 10 minutes.
Boil potatoes. Let them cool. Peel off the skin. Cut into cubes.
Slice the onion.
(The quantity of potato cubes should be equal to onion slices)
Make a smooth paste of soaked red chili and tamarind.
Heat coconut oil in a kadhai. Add udid dal and mustard seeds in it.
As the seeds sputter and dal becomes golden brown, lower the flame and add onion slices. Add salt.Fry them till they become soft. Do it on low flame (do not make the onion brown).
Once they become soft and transparent, add chili-tamarind paste. Add  a cup of water.
Add chopped potatoes. Let it boil. Cook till most of the water gets absorbed.
Serve hot with chapati.

Note
While boiling the veggie let some water remain because when it cools it becomes more dry.